PYTHON-5503 Use uv to install just in GitHub Actions (#2490) [v4.14] #8006

Job	Run time
static	3m 13s
CPython 3.13t-ubuntu-latest	11m 6s
CPython 3.9-ubuntu-latest	11m 2s
Test using minimum dependencies and supported Python	40s
DocTest	1m 8s
Test async's minimum dependencies and Python	39s
CPython pypy-3.10-ubuntu-latest	12m 8s
Docs Checks	53s
Link Check	2m 42s
Make an sdist	10s
Typing Tests (3.11)	1m 5s
Typing Tests (3.9)	1m 7s
Install from SDist and Test	47s
	46m 40s

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