PYTHON-3636 MongoClient should perform SRV resolution lazily #1874

Job	Run time
Make SDist	44s
Build wheels for manylinux_x86_64	2m 34s
Build wheels for manylinux_aarch64	11m 13s
Build wheels for manylinux_ppc64le	11m 13s
Build wheels for manylinux_s390x	11m 25s
Build wheels for manylinux_i686	2m 35s
Build wheels for win_amd6	4m 25s
Build wheels for win32	4m 59s
Build wheels for macos	3m 31s
Download Wheels	7s
	52m 46s

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