PYTHON-5406 - AsyncPeriodicExecutor must reset CSOT contextvars befor… #2374

Job	Run time
Build wheels for manylinux_x86_64	2m 29s
Build wheels for manylinux_ppc64le	10m 48s
Build wheels for win_amd6	4m 39s
Build wheels for manylinux_aarch64	11m 39s
Build wheels for win32	5m 2s
Make SDist	52s
Build wheels for manylinux_s390x	11m 37s
Build wheels for macos	4m 46s
Build wheels for manylinux_i686	2m 35s
Download Wheels	7s
	54m 34s

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