PYTHON-4991 Fix perf client.bulkWrite perf regression #1301

Job	Run time
Make SDist	35s
Build wheels for manylinux_x86_64	2m 22s
Build wheels for manylinux_aarch64	10m 44s
Build wheels for manylinux_ppc64le	9m 59s
Build wheels for manylinux_s390x	11m 56s
Build wheels for manylinux_i686	2m 32s
Build wheels for win_amd6	5m 41s
Build wheels for win32	5m 51s
Build wheels for macos	4m 24s
Download Wheels	10s
	54m 14s

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