Testing with Twisted 22.4 results in infinite loop creating temporary config files

[bnavigator]

After updating to Twisted 22.4, the test suite hangs at testGetBaseDNNoOption producing as many temporary empty config files as the filesystem would allow.

Workaround: Remove the cleanup line here:

ldaptor/ldaptor/test/test_config.py

Line 27 in 4bfe289

testCase.addCleanup(reloadFromContent, testCase, b"")