Some tests are skipped in `test_functools`

[tomasr8]

Bug report

Bug description:

TestCache is not used by any other test class in the module. I'm guessing it was intended to be used as TestLRU but it currently does not run:

cpython/Lib/test/test_functools.py

Lines 1474 to 1476 in 9837c2a

	class TestCache:
	# This tests that the pass-through is working as designed.
	# The underlying functionality is tested in TestLRU.

CPython versions tested on:

CPython main branch

Operating systems tested on:

No response

Linked PRs

• gh-130185: Fix unintentionally skipped tests in test_functools #130186
• [3.13] gh-130185: Fix unintentionally skipped tests in test_functools (GH-130186) #130188
• [3.12] gh-130185: Fix unintentionally skipped tests in test_functools (GH-130186) #130189