PYTHON-4780 Implement fast path for server selection with Primary #7814

Job	Run time
static	3m 52s
DocTest	55s
CPython 3.13-ubuntu-latest	8m 49s
CPython 3.9-ubuntu-latest	9m 2s
Link Check	3m 38s
CPython 3.13t-ubuntu-latest	9m 11s
Test using minimum dependencies and supported Python	34s
Typing Tests (3.9)	1m 8s
Make an sdist	10s
CPython pypy-3.10-ubuntu-latest	10m 24s
Test async's minimum dependencies and Python	40s
Typing Tests (3.11)	1m 12s
Docs Checks	53s
Install from SDist and Test	50s
	51m 18s

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