https://bugs.python.org/issue45628 breaks file rotation.

I name my log files after module name, run the modules in separate processes, use the same log config in them, and store the log files in one common directory. For example, for modules `a.b` and `a.b.c` I have the following log files:

a.b.log
a.b.c.log

Now after bpo-45628 fix, `getFilesToDelete` treats the rotated log files from those modules the same, and deletes wrong files. If `backupCount` is set to e.g. 7, only total of 7 files are stored instead of 7 of each.

Breaking PR: https://github.com/python/cpython/pull/29310

New changeset cb589d1b6bad4b75852c2e2a471a3800d5efdca7 by Vinay Sajip in branch 'main':
bpo-46063: Improve algorithm for computing which rolled-over log file… (GH-30093)
https://github.com/python/cpython/commit/cb589d1b6bad4b75852c2e2a471a3800d5efdca7

New changeset f84e2f6c0aca97c59ec8ce21715ae9bd89893307 by Miss Islington (bot) in branch '3.10':
[3.10] bpo-46063: Improve algorithm for computing which rolled-over log file… (GH-30093) (GH-30094)
https://github.com/python/cpython/commit/f84e2f6c0aca97c59ec8ce21715ae9bd89893307

New changeset 94234228abbb84945a48049a7515dea960bc9834 by Miss Islington (bot) in branch '3.9':
[3.9] bpo-46063: Improve algorithm for computing which rolled-over log file… (GH-30093) (GH-30095)
https://github.com/python/cpython/commit/94234228abbb84945a48049a7515dea960bc9834

% ./python.exe -We -m test -v test_logging -m test_compute_files_to_delete 
Raised RLIMIT_NOFILE: 256 -> 1024
== CPython 3.11.0a3+ (heads/main:9130a4d620, Dec 14 2021, 11:12:05) [Clang 13.0.0 (clang-1300.0.29.3)]
== macOS-11.6-x86_64-i386-64bit little-endian
== cwd: /Users/iritkatriel/src/cpython/build/test_python_86072æ
== CPU count: 12
== encodings: locale=UTF-8, FS=utf-8
0:00:00 load avg: 5.20 Run tests sequentially
0:00:00 load avg: 5.20 [1/1] test_logging
test_compute_files_to_delete (test.test_logging.TimedRotatingFileHandlerTest) ... Warning -- Unraisable exception
Exception ignored in: <_io.FileIO name='/var/folders/kf/0v7kz3ps62dg11v9rq0sz35m0000gn/T/test_logging_w3nn9vsi/d.e.log' mode='ab' closefd=True>
Traceback (most recent call last):
  File "/Users/iritkatriel/src/cpython/Lib/test/test_logging.py", line 5469, in test_compute_files_to_delete
    for i, prefix in enumerate(prefixes):
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ResourceWarning: unclosed file <_io.TextIOWrapper name='/var/folders/kf/0v7kz3ps62dg11v9rq0sz35m0000gn/T/test_logging_w3nn9vsi/d.e.log' mode='a' encoding='UTF-8'>
Warning -- Unraisable exception
Exception ignored in: <_io.FileIO name='/var/folders/kf/0v7kz3ps62dg11v9rq0sz35m0000gn/T/test_logging_w3nn9vsi/a.b.c.log' mode='ab' closefd=True>
Traceback (most recent call last):
  File "/Users/iritkatriel/src/cpython/Lib/test/test_logging.py", line 5469, in test_compute_files_to_delete
    for i, prefix in enumerate(prefixes):
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ResourceWarning: unclosed file <_io.TextIOWrapper name='/var/folders/kf/0v7kz3ps62dg11v9rq0sz35m0000gn/T/test_logging_w3nn9vsi/a.b.c.log' mode='a' encoding='UTF-8'>
Warning -- Unraisable exception
Exception ignored in: <_io.FileIO name='/var/folders/kf/0v7kz3ps62dg11v9rq0sz35m0000gn/T/test_logging_w3nn9vsi/a.b.log' mode='ab' closefd=True>
Traceback (most recent call last):
  File "/Users/iritkatriel/src/cpython/Lib/test/test_logging.py", line 5469, in test_compute_files_to_delete
    for i, prefix in enumerate(prefixes):
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ResourceWarning: unclosed file <_io.TextIOWrapper name='/var/folders/kf/0v7kz3ps62dg11v9rq0sz35m0000gn/T/test_logging_w3nn9vsi/a.b.log' mode='a' encoding='UTF-8'>
Warning -- Unraisable exception
Exception ignored in: <_io.FileIO name='/var/folders/kf/0v7kz3ps62dg11v9rq0sz35m0000gn/T/test_logging_w3nn9vsi/d.e.f.log' mode='ab' closefd=True>
Traceback (most recent call last):
  File "/Users/iritkatriel/src/cpython/Lib/test/test_logging.py", line 5469, in test_compute_files_to_delete
    for i, prefix in enumerate(prefixes):
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ResourceWarning: unclosed file <_io.TextIOWrapper name='/var/folders/kf/0v7kz3ps62dg11v9rq0sz35m0000gn/T/test_logging_w3nn9vsi/d.e.f.log' mode='a' encoding='UTF-8'>
ok

----------------------------------------------------------------------
Ran 1 test in 0.016s

OK
test_logging failed (env changed)

== Tests result: SUCCESS ==

1 test altered the execution environment:
    test_logging

Ah ... forgot to set delay=True for the handlers. Will look at this soon.

New changeset 850aefc2c651110a784cd5478af9774b1f6287a3 by Vinay Sajip in branch 'main':
bpo-46063: Add 'delay=True' to file handler initialization. (GH-30103)
https://github.com/python/cpython/commit/850aefc2c651110a784cd5478af9774b1f6287a3

New changeset 908fd691f96403a3c30d85c17dd74ed1f26a60fd by Miss Islington (bot) in branch '3.10':
[3.10] bpo-46063: Add 'delay=True' to file handler initialization. (GH-30103) (GH-30104)
https://github.com/python/cpython/commit/908fd691f96403a3c30d85c17dd74ed1f26a60fd

New changeset 17260e44b5ed3508e3c15f1b7ded761879e91d3e by Miss Islington (bot) in branch '3.9':
[3.9] bpo-46063: Add 'delay=True' to file handler initialization. (GH-30103) (GH-30105)
https://github.com/python/cpython/commit/17260e44b5ed3508e3c15f1b7ded761879e91d3e