PYTHON-4815 Migrate test_discovery_and_monitoring.py to async #783

Job	Run time
Build wheels for manylinux_x86_64	2m 23s
Make SDist	42s
Build wheels for manylinux_aarch64	10m 15s
Build wheels for manylinux_ppc64le	9m 57s
Build wheels for manylinux_s390x	10m 8s
Build wheels for manylinux_i686	2m 29s
Build wheels for win_amd6	6m 9s
Build wheels for win32	5m 34s
Build wheels for macos	3m 6s
Download Wheels	9s
	50m 52s

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