opentelemetry-instrumentation-falcon: expand supported version to v4 (open-telemetry#3086)

* opentelemetry-instrumentation-falcon: expand supported version to v4

Falcon v4 has a mostly identical interface to v3, and is proved to be fully compatible with `opentelemetry-instrumentation-falcon`. Loose the version check to `<5.0.0` to avoid false `DependencyConflict` alarm.

* opentelemetry-instrumentation-falcon: generate tests for v4

* opentelemetry-instrumentation-falcon: prepare tests for v4

* opentelemetry-instrumentation-falcon: add test preset for `~=3.1.2`

* docs: add changelog for Falcon v4 instrumentation

* opentelemetry-instrumentation-falcon: adjust pylint mark for v4

* _has_fixed_http_target property

Signed-off-by: emdneto <[email protected]>

* move changelog to the correct section

Signed-off-by: emdneto <[email protected]>

* fix test and bootstrap_gen

Signed-off-by: emdneto <[email protected]>

---------

Signed-off-by: emdneto <[email protected]>
Co-authored-by: emdneto <[email protected]>

Author: stevapple

.github/workflows/core_contrib_test_0.yml

@@ -657,6 +657,28 @@ jobs:
       - name: Run tests
         run: tox -e py38-test-instrumentation-falcon-2 -- -ra
 
+  py38-test-instrumentation-falcon-3:
+    name: instrumentation-falcon-3 
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout contrib repo @ SHA - ${{ env.CONTRIB_REPO_SHA }}
+        uses: actions/checkout@v4
+        with:
+          repository: open-telemetry/opentelemetry-python-contrib
+          ref: ${{ env.CONTRIB_REPO_SHA }}
+
+      - name: Set up Python 3.8
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.8"
+          architecture: "x64"
+
+      - name: Install tox
+        run: pip install tox
+
+      - name: Run tests
+        run: tox -e py38-test-instrumentation-falcon-3 -- -ra
+
   py38-test-instrumentation-fastapi:
     name: instrumentation-fastapi 
     runs-on: ubuntu-latest