`test_typing` fails refleak tests

[sobolevn]

Repro: ./python.exe -m test -R 3:3 -v test_typing

The first test round passes, but the second one fails with:

======================================================================
FAIL: test_bytestring (test.test_typing.CollectionsAbcTests.test_bytestring)
----------------------------------------------------------------------
Traceback (most recent call last):
 File "/Users/sobolev/Desktop/cpython/Lib/test/test_typing.py", line 6007, in test_bytestring
 with self.assertWarns(DeprecationWarning):
AssertionError: DeprecationWarning not triggered

----------------------------------------------------------------------
Ran 576 tests in 1.479s

FAILED (failures=1, skipped=1)
test test_typing failed
test_typing failed (1 failure)

I am working on a fix.

Linked PRs

• gh-104415: Fix refleak tests for typing.ByteString deprecation #104416