PYTHON-4901 Move generated Evergreen variants to an included file #1071

Job	Run time
Build wheels for manylinux_x86_64	2m 15s
Build wheels for manylinux_aarch64	10m 39s
Build wheels for manylinux_ppc64le	10m 17s
Build wheels for manylinux_s390x	10m 59s
Build wheels for manylinux_i686	2m 37s
Build wheels for win_amd6	5m 14s
Build wheels for win32	5m 30s
Build wheels for macos	3m 10s
Make SDist	39s
Download Wheels	13s
	51m 33s

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