Skip test_tell_workers_when_peers_have_left on py3.10

[fjetter]

I suspect that this is due to the bugs in asyncio.wait_for

We've only seen this test fail for python3.10 so let's skip it there

[github-actions]

Unit Test Results

See test report for an extended history of previous test failures. This is useful for diagnosing flaky tests.

    25 files  +    1      25 suites  +1   10h 16m 25s ⏱️ + 19m 51s
 4 123 tests ±    0   4 008 ✅  -     1    110 💤 ± 0  5 ❌ +1 
47 622 runs  +2 679  45 528 ✅ +2 614  2 087 💤 +63  7 ❌ +2 

For more details on these failures, see this check.

Results for commit e33ecd1. ± Comparison against base commit 928d770.