PYTHON-4745 - Test behavior of async task cancellation #1616

Job	Run time
Make SDist	33s
Build wheels for manylinux_x86_64	2m 16s
Build wheels for manylinux_aarch64	11m 46s
Build wheels for manylinux_ppc64le	10m 48s
Build wheels for manylinux_s390x	11m 36s
Build wheels for manylinux_i686	2m 53s
Build wheels for win_amd6	4m 15s
Build wheels for win32	4m 49s
Build wheels for macos	5m 14s
Download Wheels	5s
	54m 15s

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