PYTHON-3636 MongoClient should perform SRV resolution lazily #1872

Job	Run time
Build wheels for manylinux_x86_64	2m 11s
Build wheels for manylinux_aarch64	8m 31s
Make SDist	29s
Build wheels for manylinux_ppc64le	8m 31s
Build wheels for manylinux_s390x	8m 31s
Build wheels for manylinux_i686	2m 47s
Build wheels for win_amd6	5m 54s
Build wheels for win32	5m 33s
Build wheels for macos	3m 57s
Download Wheels	1s
	46m 25s

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