Test `test_bpo_45813_2` in `test_coroutines` generates a "coroutine was never awaited" warning

[sobolevn]

While playing around with #100582 and looking at build/test logs, I've noticed that there's this warning:

» ./python.exe -m test -v test_coroutines -m test_bpo_45813_2
== CPython 3.12.0a3+ (heads/issue-100577-dirty:43e3659e33, Dec 28 2022, 14:38:55) [Clang 11.0.0 (clang-1100.0.33.16)]
== macOS-10.14.6-x86_64-i386-64bit little-endian
== Python build: debug
== cwd: /Users/sobolev/Desktop/cpython/build/test_python_45783æ
== CPU count: 4
== encodings: locale=UTF-8, FS=utf-8
0:00:00 load avg: 1.32 Run tests sequentially
0:00:00 load avg: 1.32 [1/1] test_coroutines
test_bpo_45813_2 (test.test_coroutines.CoroutineTest.test_bpo_45813_2)
This would crash the interpreter in 3.11a2 ... /Users/sobolev/Desktop/cpython/Lib/test/test_coroutines.py:2217: RuntimeWarning: coroutine 'CoroutineTest.test_bpo_45813_2.<locals>.f' was never awaited
  if method() is not None:
RuntimeWarning: Enable tracemalloc to get the object allocation traceback
ok

I propose to fix it, there's no need for it. PR is incoming.

Linked PRs

• gh-100600: Fix "coroutine was never awaited" warning in test_coroutines #100601
• [3.11] gh-100600: Fix "coroutine was never awaited" warning in test_coroutines (GH-100601) #100605