PYTHON-4677 Specify how maxTimeMS can be set for explain helpers #7818

Job	Run time
static	3m 55s
CPython pypy-3.10-ubuntu-latest	10m 19s
CPython 3.9-ubuntu-latest	9m 17s
CPython 3.13-ubuntu-latest	8m 53s
Docs Checks	51s
CPython 3.13t-ubuntu-latest	9m 10s
DocTest	49s
Make an sdist	14s
Link Check	8m 38s
Typing Tests (3.9)	1m 11s
Test using minimum dependencies and supported Python	34s
Typing Tests (3.11)	1m 10s
Test async's minimum dependencies and Python	41s
Install from SDist and Test	43s
	56m 25s

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