Openning as proposed in #97535 (comment)

We had multiple issues with test_asyncio before. Some tests are changing env, some are just flaky:

• asyncio pgo + lto buildbot failure: altered environment #97535
• Running tests in parallel on Windows quits too soon #95027
• test_asyncio environment changed during test execution due to empty threading._dangling without MainThread before some tests #91676
• [Windows] : Proactor test_sendfile_close_peer_in_the_middle_of_receiving failure #85848
• flaky test.test_asyncio.test_events.ProactorEventLoopTests.test_call_later #85801
• test_asyncio: test_start_tls_server_1() fails randomly #76639
• Any others?

It is proposed to analyze what is causing this to happen again and again.
And fix it, of course :)

Linked PRs

• GH-97546: fix flaky asyncio test_wait_for_race_condition test #102421