fix(flask): remove deprecated hooks in flask 2.3.0 [backport #5663 to 1.12] (#5696)

Backport of #5663 to 1.12

Fixes Flask patching errors for the Flask release 2.3.0, and adjusts the
CI pipeline:

- Deprecated hooks `Flask.before_first_request` and
`Blueprint.before_app_first_request`
- Dropped support for Python 3.7

Fixes #5671

## Checklist
- [x] Change(s) are motivated and described in the PR description.
- [x] Testing strategy is described if automated tests are not included
in the PR.
- [x] Risk is outlined (performance impact, potential for breakage,
maintainability, etc).
- [x] Change is maintainable (easy to change, telemetry, documentation).
- [x] [Library release note
guidelines](https://ddtrace.readthedocs.io/en/stable/contributing.html#Release-Note-Guidelines)
are followed.
- [x] Documentation is included (in-code, generated user docs, [public
corp docs](https://github.com/DataDog/documentation/)).
- [x] PR description includes explicit acknowledgement/acceptance of the
performance implications of this PR as reported in the benchmarks PR
comment.

## Reviewer Checklist
- [x] Title is accurate.
- [x] No unnecessary changes are introduced.
- [x] Description motivates each change.
- [x] Avoids breaking
[API](https://ddtrace.readthedocs.io/en/stable/versioning.html#interfaces)
changes unless absolutely necessary.
- [x] Testing strategy adequately addresses listed risk(s).
- [x] Change is maintainable (easy to change, telemetry, documentation).
- [x] Release note makes sense to a user of the library.
- [x] Reviewer has explicitly acknowledged and discussed the performance
implications of this PR as reported in the benchmarks PR comment.

Author: gnufede

.riot/requirements/2a3d7ea.txt renamed to .riot/requirements/110a49d.txt

@@ -1,35 +1,34 @@
 #
-# This file is autogenerated by pip-compile with Python 3.7
+# This file is autogenerated by pip-compile with Python 3.10
 # by the following command:
 #
-#    pip-compile --no-annotate --resolver=backtracking .riot/requirements/2a3d7ea.in
+#    pip-compile --no-annotate --resolver=backtracking .riot/requirements/110a49d.in
 #
-attrs==22.2.0
-blinker==1.5
+attrs==23.1.0
+blinker==1.6.2
 certifi==2022.12.7
 charset-normalizer==3.1.0
 click==8.1.3
-coverage[toml]==7.2.2
+coverage[toml]==7.2.3
 exceptiongroup==1.1.1
-flask==2.2.3
+flask==2.0.3
 hypothesis==6.45.0
 idna==3.4
 importlib-metadata==6.0.0
 iniconfig==2.0.0
 itsdangerous==2.1.2
 jinja2==3.1.2
 markupsafe==2.1.2
-mock==5.0.1
+mock==5.0.2
 opentracing==2.4.0
-packaging==23.0
+packaging==23.1
 pluggy==1.0.0
-pytest==7.2.2
+pytest==7.3.1
 pytest-cov==4.0.0
 pytest-mock==3.10.0
-requests==2.28.2
+requests==2.29.0
 sortedcontainers==2.4.0
 tomli==2.0.1
-typing-extensions==4.5.0
 urllib3==1.26.15
-werkzeug==2.2.3
+werkzeug==2.3.0
 zipp==3.15.0

.riot/requirements/1119833.txt

@@ -0,0 +1,34 @@
+#
+# This file is autogenerated by pip-compile with Python 3.8
+# by the following command:
+#
+#    pip-compile --no-annotate --resolver=backtracking .riot/requirements/1119833.in
+#
+attrs==23.1.0
+blinker==1.6.2
+certifi==2022.12.7
+charset-normalizer==3.1.0
+click==8.1.3
+coverage[toml]==7.2.3
+exceptiongroup==1.1.1
+flask==2.3.1
+hypothesis==6.45.0
+idna==3.4
+importlib-metadata==6.0.0
+iniconfig==2.0.0
+itsdangerous==2.1.2
+jinja2==3.1.2
+markupsafe==2.1.2
+mock==5.0.2
+opentracing==2.4.0
+packaging==23.1
+pluggy==1.0.0
+pytest==7.3.1
+pytest-cov==4.0.0
+pytest-mock==3.10.0
+requests==2.29.0
+sortedcontainers==2.4.0
+tomli==2.0.1
+urllib3==1.26.15
+werkzeug==2.3.0
+zipp==3.15.0

.riot/requirements/114a87c.txt

@@ -0,0 +1,34 @@
+#
+# This file is autogenerated by pip-compile with Python 3.9
+# by the following command:
+#
+#    pip-compile --no-annotate --resolver=backtracking .riot/requirements/114a87c.in
+#
+attrs==23.1.0
+blinker==1.6.2
+certifi==2022.12.7
+charset-normalizer==3.1.0
+click==8.1.3
+coverage[toml]==7.2.3
+exceptiongroup==1.1.1
+flask==2.3.1
+hypothesis==6.45.0
+idna==3.4
+importlib-metadata==6.0.0
+iniconfig==2.0.0
+itsdangerous==2.1.2
+jinja2==3.1.2
+markupsafe==2.1.2
+mock==5.0.2
+opentracing==2.4.0
+packaging==23.1
+pluggy==1.0.0
+pytest==7.3.1
+pytest-cov==4.0.0
+pytest-mock==3.10.0
+requests==2.29.0
+sortedcontainers==2.4.0
+tomli==2.0.1
+urllib3==1.26.15
+werkzeug==2.3.0
+zipp==3.15.0

.riot/requirements/117247d.txt

@@ -0,0 +1,34 @@
+#
+# This file is autogenerated by pip-compile with Python 3.8
+# by the following command:
+#
+#    pip-compile --no-annotate --resolver=backtracking .riot/requirements/117247d.in
+#
+attrs==23.1.0
+blinker==1.6.2
+certifi==2022.12.7
+charset-normalizer==3.1.0
+click==8.1.3
+coverage[toml]==7.2.3
+exceptiongroup==1.1.1
+flask==2.0.3
+hypothesis==6.45.0
+idna==3.4
+importlib-metadata==6.0.0
+iniconfig==2.0.0
+itsdangerous==2.1.2
+jinja2==3.1.2
+markupsafe==2.1.2
+mock==5.0.2
+opentracing==2.4.0
+packaging==23.1
+pluggy==1.0.0
+pytest==7.3.1
+pytest-cov==4.0.0
+pytest-mock==3.10.0
+requests==2.29.0
+sortedcontainers==2.4.0
+tomli==2.0.1
+urllib3==1.26.15
+werkzeug==2.3.0
+zipp==3.15.0

.riot/requirements/1646549.txt renamed to .riot/requirements/124f693.txt

@@ -2,7 +2,7 @@
 # This file is autogenerated by pip-compile
 # To update, run:
 #
-#    pip-compile --no-annotate .riot/requirements/1646549.in
+#    pip-compile --no-annotate .riot/requirements/124f693.in
 #
 atomicwrites==1.4.1
 attrs==21.4.0
@@ -24,9 +24,11 @@ markupsafe==1.1.1
 mock==3.0.5
 more-itertools==5.0.0
 opentracing==2.4.0
+packaging==20.9
 pathlib2==2.3.7.post1
 pluggy==0.13.1
 py==1.11.0
+pyparsing==2.4.7
 pytest-cov==2.1.0
 pytest-mock==2.0.0
 pytest==3.10.1

.riot/requirements/13a213a.txt

@@ -0,0 +1,34 @@
+#
+# This file is autogenerated by pip-compile with Python 3.9
+# by the following command:
+#
+#    pip-compile --no-annotate --resolver=backtracking .riot/requirements/13a213a.in
+#
+attrs==23.1.0
+blinker==1.6.2
+certifi==2022.12.7
+charset-normalizer==3.1.0
+click==8.1.3
+coverage[toml]==7.2.3
+exceptiongroup==1.1.1
+flask==2.3.1
+hypothesis==6.45.0
+idna==3.4
+importlib-metadata==6.0.0
+iniconfig==2.0.0
+itsdangerous==2.1.2
+jinja2==3.1.2
+markupsafe==2.1.2
+mock==5.0.2
+opentracing==2.4.0
+packaging==23.1
+pluggy==1.0.0
+pytest==7.3.1
+pytest-cov==4.0.0
+pytest-mock==3.10.0
+requests==2.29.0
+sortedcontainers==2.4.0
+tomli==2.0.1
+urllib3==1.26.15
+werkzeug==2.3.0
+zipp==3.15.0

.riot/requirements/8f570cd.txt renamed to .riot/requirements/141a618.txt

@@ -2,22 +2,23 @@
 # This file is autogenerated by pip-compile with Python 3.8
 # by the following command:
 #
-#    pip-compile --no-annotate --resolver=backtracking .riot/requirements/8f570cd.in
+#    pip-compile --no-annotate --resolver=backtracking .riot/requirements/141a618.in
 #
 atomicwrites==1.4.1
-attrs==22.2.0
-blinker==1.5
+attrs==23.1.0
+blinker==1.6.2
 click==8.1.3
-coverage==7.2.2
+coverage==7.2.3
 flask==0.12.5
 flask-cache==0.13.1
 hypothesis==6.45.0
 itsdangerous==1.1.0
 jinja2==2.11.3
 markupsafe==1.1.1
-mock==5.0.1
+mock==5.0.2
 more-itertools==8.10.0
 opentracing==2.4.0
+packaging==23.1
 pluggy==1.0.0
 py==1.11.0
 pytest==3.10.1

.riot/requirements/1474435.txt renamed to .riot/requirements/142fe39.txt

@@ -2,33 +2,33 @@
 # This file is autogenerated by pip-compile with Python 3.9
 # by the following command:
 #
-#    pip-compile --no-annotate --resolver=backtracking .riot/requirements/1474435.in
+#    pip-compile --no-annotate --resolver=backtracking .riot/requirements/142fe39.in
 #
-attrs==22.2.0
-blinker==1.5
+attrs==23.1.0
+blinker==1.6.2
 cachelib==0.9.0
 click==8.1.3
-coverage[toml]==7.2.2
+coverage[toml]==7.2.3
 exceptiongroup==1.1.1
-flask==2.2.3
+flask==2.3.1
 flask-caching==2.0.2
 hypothesis==6.45.0
-importlib-metadata==6.0.0
+importlib-metadata==6.6.0
 iniconfig==2.0.0
 itsdangerous==2.1.2
 jinja2==3.1.2
 markupsafe==2.1.2
-mock==5.0.1
+mock==5.0.2
 opentracing==2.4.0
-packaging==23.0
+packaging==23.1
 pluggy==1.0.0
-pytest==7.2.2
+pytest==7.3.1
 pytest-cov==4.0.0
 pytest-mock==3.10.0
 python-memcached==1.59
 redis==2.10.6
 six==1.16.0
 sortedcontainers==2.4.0
 tomli==2.0.1
-werkzeug==2.2.3
+werkzeug==2.3.0
 zipp==3.15.0

.riot/requirements/155a4f0.txt

@@ -0,0 +1,34 @@
+#
+# This file is autogenerated by pip-compile with Python 3.8
+# by the following command:
+#
+#    pip-compile --no-annotate --resolver=backtracking .riot/requirements/155a4f0.in
+#
+attrs==23.1.0
+blinker==1.6.2
+certifi==2022.12.7
+charset-normalizer==3.1.0
+click==8.1.3
+coverage[toml]==7.2.3
+exceptiongroup==1.1.1
+flask==2.3.1
+hypothesis==6.45.0
+idna==3.4
+importlib-metadata==6.0.0
+iniconfig==2.0.0
+itsdangerous==2.1.2
+jinja2==3.1.2
+markupsafe==2.1.2
+mock==5.0.2
+opentracing==2.4.0
+packaging==23.1
+pluggy==1.0.0
+pytest==7.3.1
+pytest-cov==4.0.0
+pytest-mock==3.10.0
+requests==2.29.0
+sortedcontainers==2.4.0
+tomli==2.0.1
+urllib3==1.26.15
+werkzeug==2.3.0
+zipp==3.15.0

.riot/requirements/1aa3a83.txt renamed to .riot/requirements/155fc8a.txt

@@ -2,29 +2,29 @@
 # This file is autogenerated by pip-compile with Python 3.11
 # by the following command:
 #
-#    pip-compile --no-annotate --resolver=backtracking .riot/requirements/1aa3a83.in
+#    pip-compile --no-annotate --resolver=backtracking .riot/requirements/155fc8a.in
 #
-attrs==22.2.0
-blinker==1.5
+attrs==23.1.0
+blinker==1.6.2
 cachelib==0.9.0
 click==8.1.3
-coverage[toml]==7.2.2
-flask==2.2.3
+coverage[toml]==7.2.3
+flask==2.3.1
 flask-caching==2.0.2
 hypothesis==6.45.0
 iniconfig==2.0.0
 itsdangerous==2.1.2
 jinja2==3.1.2
 markupsafe==2.1.2
-mock==5.0.1
+mock==5.0.2
 opentracing==2.4.0
-packaging==23.0
+packaging==23.1
 pluggy==1.0.0
-pytest==7.2.2
+pytest==7.3.1
 pytest-cov==4.0.0
 pytest-mock==3.10.0
 python-memcached==1.59
 redis==2.10.6
 six==1.16.0
 sortedcontainers==2.4.0
-werkzeug==2.2.3
+werkzeug==2.3.0