PYTHON-5215 Add an asyncio.Protocol implementation for KMS #7953

Job	Run time
Typing Tests (3.11)	1m 6s
Link Check	2m 51s
CPython 3.9-ubuntu-latest	11m 22s
DocTest	1m 13s
Typing Tests (3.9)	1m 7s
CPython 3.13t-ubuntu-latest	11m 14s
CPython pypy-3.10-ubuntu-latest	12m 13s
static	3m 15s
Docs Checks	43s
Make an sdist	14s
Test async's minimum dependencies and Python	47s
Test using minimum dependencies and supported Python	40s
Install from SDist and Test	1m 8s
	47m 53s

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