PYTHON-3636 MongoClient should perform SRV resolution lazily #1877

Job	Run time
Build wheels for manylinux_x86_64	2m 8s
Build wheels for manylinux_aarch64	11m 4s
Make SDist	27s
Build wheels for manylinux_ppc64le	10m 51s
Build wheels for manylinux_s390x	11m 17s
Build wheels for manylinux_i686	2m 31s
Build wheels for win_amd6	5m 28s
Build wheels for win32	5m 23s
Build wheels for macos	3m 37s
Download Wheels	6s
	52m 52s

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