chore(deps): Upgrade snippets and sample dependencies (#1421)

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: abbrowne126

.github/workflows/lint.yml

@@ -12,7 +12,7 @@ jobs:
     - name: Setup Python
       uses: actions/setup-python@v5
       with:
-        python-version: "3.8"
+        python-version: "3.10"
     - name: Install nox
       run: |
         python -m pip install --upgrade setuptools pip wheel

noxfile.py

@@ -34,7 +34,7 @@
 
 MYPY_VERSION = "mypy==1.10.0"
 
-DEFAULT_PYTHON_VERSION = "3.8"
+DEFAULT_PYTHON_VERSION = "3.10"
 
 UNIT_TEST_PYTHON_VERSIONS: List[str] = [
     "3.7",
@@ -351,7 +351,7 @@ def cover(session):
     session.run("coverage", "erase")
 
 
-@nox.session(python="3.10")
+@nox.session(python=DEFAULT_PYTHON_VERSION)
 def docs(session):
     """Build the docs for this library."""
 
@@ -386,7 +386,7 @@ def docs(session):
     )
 
 
-@nox.session(python="3.10")
+@nox.session(python=DEFAULT_PYTHON_VERSION)
 def docfx(session):
     """Build the docfx yaml files for this library."""
 

samples/snippets/requirements-test.txt

@@ -1,8 +1,9 @@
 backoff==2.2.1
 pytest===7.4.4; python_version == '3.7'
-pytest==8.3.5; python_version >= '3.8'
+pytest===8.3.5; python_version == '3.8'
+pytest==8.4.0; python_version >= '3.9'
 mock==5.2.0
 flaky==3.8.1
-google-cloud-bigquery==3.30.0; python_version < '3.9'
-google-cloud-bigquery==3.33.0; python_version >= '3.9'
+google-cloud-bigquery===3.30.0; python_version <= '3.8'
+google-cloud-bigquery==3.34.0; python_version >= '3.9'
 google-cloud-storage==3.1.0

samples/snippets/requirements.txt

@@ -1,11 +1,13 @@
-google-cloud-pubsub==2.29.0
+google-cloud-pubsub==2.29.1
 avro==1.12.0
 protobuf===4.24.4; python_version == '3.7'
 protobuf===5.29.4; python_version == '3.8'
 protobuf==6.31.1; python_version >= '3.9'
 avro==1.12.0
 opentelemetry-api===1.22.0; python_version == '3.7'
 opentelemetry-sdk===1.22.0; python_version == '3.7'
-opentelemetry-api==1.33.1; python_version >= '3.8'
-opentelemetry-sdk==1.33.1; python_version >= '3.8'
+opentelemetry-api===1.33.1; python_version == '3.8'
+opentelemetry-sdk===1.33.1; python_version == '3.8'
+opentelemetry-api==1.34.0; python_version >= '3.9'
+opentelemetry-sdk==1.34.0; python_version >= '3.9'
 opentelemetry-exporter-gcp-trace==1.9.0