PYTHON-5395 - Add convert_decimal to CodecOptions #2740

Job	Run time
Make SDist	35s
Build wheels for manylinux_aarch64	11m 54s
Build wheels for manylinux_s390x	11m 14s
Build wheels for macos	4m 9s
Build wheels for win32	4m 13s
Build wheels for win_amd6	4m 19s
Build wheels for manylinux_ppc64le	11m 16s
Build wheels for manylinux_i686	2m 34s
Build wheels for manylinux_x86_64	2m 26s
Download Wheels	7s
	52m 47s

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