test_ssl test_get_server_certificate_timeout is flaky on macOS

[tiran]

Bug report

test_get_server_certificate_timeout is flaky and sometimes fails on macOS. The issue was previously reported in #88109 and #88403.

======================================================================
FAIL: test_get_server_certificate_timeout (test.test_ssl.SimpleBackgroundTests.test_get_server_certificate_timeout)
----------------------------------------------------------------------
Traceback (most recent call last):
 File "/Users/runner/work/cpython/cpython/Lib/test/test_ssl.py", line 1981, in test_get_server_certificate_timeout
 with self.assertRaises(socket.timeout):
AssertionError: TimeoutError not raised

[erlend-aasland]

New failure: https://github.com/python/cpython/runs/7700092385?check_suite_focus=true

[mdickinson]

And another one here: https://github.com/python/cpython/runs/7773405614?check_suite_focus=true

[erlend-aasland]

There has been no reports for over a year and a half. Suggesting to close as outdated.

[mdickinson]

Suggesting to close as outdated.

SGTM.