PYTHON-3636 MongoClient should perform SRV resolution lazily #1822

Job	Run time
Build wheels for manylinux_x86_64	2m 14s
Make SDist	1m 4s
Build wheels for manylinux_aarch64	11m 18s
Build wheels for manylinux_ppc64le	10m 41s
Build wheels for manylinux_s390x	11m 34s
Build wheels for manylinux_i686	2m 28s
Build wheels for win_amd6	6m 4s
Build wheels for win32	5m 38s
Build wheels for macos	3m 21s
Download Wheels	6s
	54m 28s

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