python: properly propagate shutdown signal in weblogs

[florentinl]

Motivation

Re-enable this test: tests/test_resource_renaming.py::Test_Resource_Renaming_Stats_Aggregation_Keys::test_stats_aggregation_with_method_and_endpoint.

The main problem is that the weblog never receive the SIGTERM signal from Docker and get killed right away without having the possibility to flush their buffers on shutdown.

This PR ensures that the SIGTERM signal properly propagates to the python interpreters running the app and and can be caught by dd-trace-py.

Changes

• Use exec to replace the shell process with the actual ddtrace-run command.
• re-enable the test (except for uwsgi, that does not forward signals to workers)

Workflow

1. ⚠️ Create your PR as draft ⚠️
2. Work on you PR until the CI passes
3. Mark it as ready for review
   • Test logic is modified? -> Get a review from RFC owner.
   • Framework is modified, or non obvious usage of it -> get a review from R&P team

🚀 Once your PR is reviewed and the CI green, you can merge it!

🛟 #apm-shared-testing 🛟

Reviewer checklist

• Anything but tests/ or manifests/ is modified ? I have the approval from R&P team
• A docker base image is modified?
  • the relevant build-XXX-image label is present
• A scenario is added, removed or renamed?
  • Get a review from R&P team

[github-actions]

CODEOWNERS have been resolved as:

manifests/python.yml                                                    @DataDog/apm-python @DataDog/asm-python
utils/build/docker/python/django-poc.Dockerfile                         @DataDog/apm-python @DataDog/asm-python @DataDog/system-tests-core
utils/build/docker/python/django-py3.13.Dockerfile                      @DataDog/apm-python @DataDog/asm-python @DataDog/system-tests-core
utils/build/docker/python/django/app.sh                                 @DataDog/apm-python @DataDog/asm-python @DataDog/system-tests-core
utils/build/docker/python/docker-bake.hcl                               @DataDog/apm-python @DataDog/asm-python @DataDog/system-tests-core
utils/build/docker/python/fastapi.Dockerfile                            @DataDog/apm-python @DataDog/asm-python @DataDog/system-tests-core
utils/build/docker/python/fastapi/app.sh                                @DataDog/apm-python @DataDog/asm-python @DataDog/system-tests-core
utils/build/docker/python/flask-poc.Dockerfile                          @DataDog/apm-python @DataDog/asm-python @DataDog/system-tests-core
utils/build/docker/python/flask/app.sh                                  @DataDog/apm-python @DataDog/asm-python @DataDog/system-tests-core
utils/build/docker/python/python3.12.Dockerfile                         @DataDog/apm-python @DataDog/asm-python @DataDog/system-tests-core
utils/build/docker/python/tornado.Dockerfile                            @DataDog/apm-python @DataDog/asm-python @DataDog/system-tests-core
utils/build/docker/python/tornado/app.sh                                @DataDog/apm-python @DataDog/asm-python @DataDog/system-tests-core
utils/build/docker/python/uds-flask.Dockerfile                          @DataDog/apm-python @DataDog/asm-python @DataDog/system-tests-core

[datadog-datadog-prod-us1-2]

✅ Tests

🎉 All green!

❄️ No new flaky tests detected
🧪 All tests passed

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