PYTHON-3636 MongoClient should perform SRV resolution lazily #1887

Job	Run time
Make SDist	42s
Build wheels for manylinux_x86_64	2m 17s
Build wheels for manylinux_aarch64	11m 32s
Build wheels for manylinux_ppc64le	10m 54s
Build wheels for manylinux_s390x	11m 10s
Build wheels for manylinux_i686	2m 27s
Build wheels for win_amd6	4m 41s
Build wheels for win32	5m 26s
Build wheels for macos	4m 19s
Download Wheels	12s
	53m 40s

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