fix(ci): Re-enable skipped tests

[sentrivana]

Description

We had to resort to skipping two tests in https://github.com/getsentry/sentry-python/pull/5088/files since they were blocking the release. Re-enabling them here.

It looks like the worst of the flakiness comes with newer coverage (>=7.11.1). Pinning it here.

Issues

Closes #5101
Closes https://linear.app/getsentry/issue/PY-1974/fix-skipped-tests

Reminders

• Please add tests to validate your changes, and lint your code using tox -e linters.
• Add GH Issue ID & Linear ID (if applicable)
• PR title should use conventional commit style (feat:, fix:, ref:, meta:)
• For external contributors: CONTRIBUTING.md, Sentry SDK development docs, Discord community

[linear]

PY-1974 Fix skipped tests

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.95%. Comparing base (0aebb18) to head (3d8067b).
⚠️ Report is 1 commits behind head on master.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #5104   +/-   ##
=======================================
  Coverage   83.95%   83.95%           
=======================================
  Files         180      180           
  Lines       18023    18023           
  Branches     3205     3205           
=======================================
  Hits        15131    15131           
  Misses       1917     1917           
  Partials      975      975