PYTHON-5542 Prepare for 4.15.1 Release #8179

Job	Run time
DocTest	1m 9s
static	1m 16s
CPython pypy-3.10-ubuntu-latest	4m 43s
Docs Checks	31s
CPython 3.9-ubuntu-latest	4m 43s
CPython 3.13t-ubuntu-latest	4m 42s
Link Check	44s
Typing Tests (3.11)	1m 6s
Make an sdist	19s
Typing Tests (3.9)	1m 3s
Test using minimum dependencies and supported Python	38s
Test async's minimum dependencies and Python	43s
Install from SDist and Test	1m 3s
	22m 40s

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