PYTHON-5212 [v4.12] Do not hold Topology lock while resetting pool #2217

Job	Run time
Build wheels for manylinux_x86_64	2m 17s
Make SDist	39s
Build wheels for manylinux_aarch64	11m 19s
Build wheels for manylinux_ppc64le	11m 27s
Build wheels for manylinux_s390x	11m 30s
Build wheels for manylinux_i686	2m 22s
Build wheels for win_amd6	4m 28s
Build wheels for win32	5m 36s
Build wheels for macos	3m 12s
Download Wheels	9s
	52m 59s

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