PYTHON-4805 Migrate test_connections_survive_primary_stepdown_spec.py to async #762

Job	Run time
Make SDist	31s
Build wheels for manylinux_x86_64	2m 22s
Build wheels for manylinux_aarch64	10m 19s
Build wheels for manylinux_ppc64le	9m 37s
Build wheels for manylinux_s390x	10m 4s
Build wheels for manylinux_i686	2m 26s
Build wheels for win_amd6	5m 40s
Build wheels for win32	4m 15s
Build wheels for macos	3m 15s
Download Wheels	10s
	48m 39s

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