chore: extend pyramid flaky test timestamp (#11369)

The pyramid test flaky marker was set to Jan 2024 so it is expired by
now. This PR updates the test.

While looking at the failed pipelines, example:
https://gitlab.ddbuild.io/DataDog/apm-reliability/dd-trace-py/-/jobs/703862626

One of the reasons it fails is because there's a new base service name
and it is no longer blank:
```
meta mismatch on '_dd.base_service': got 'tests.contrib.pyramid.app' which does not match expected ''.
```
Related to #11274

Also, this PR sets a new flaky timestamp because the pyramid sample app
doesn't spin up correctly in the subprocesses, leading to failed tests.

Relates to AIDM-483

## Checklist
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Author: wantsui

tests/contrib/pyramid/test_pyramid.py

@@ -253,7 +253,7 @@ def pyramid_client(snapshot, pyramid_app):
         proc.terminate()
 
 
-@flaky(until=1706677200)
+@flaky(1740089353, reason="Sample app doesn't seem to spin up in subprocess")
 @pytest.mark.parametrize(
     "pyramid_app",
     [

tests/snapshots/tests.contrib.pyramid.test_pyramid.test_simple_pyramid_app_endpoint[ddtrace-run_python_tests_contrib_pyramid_app_app.py].json

@@ -9,7 +9,7 @@
     "type": "web",
     "error": 0,
     "meta": {
-      "_dd.base_service": "",
+      "_dd.base_service": "tests.contrib.pyramid.app",
       "_dd.p.dm": "-0",
       "_dd.p.tid": "654a694400000000",
       "component": "pyramid",