docs: document more differences among different backends #10195

Job	Run time
Build source distribution	10s
determine-arm64-runner	1s
Build wheels for cp311-manylinux_x86_64	6m 6s
Build wheels for cp311-manylinux_x86_64	6m 9s
Build wheels for cp311-macosx_x86_64	6m 18s
Build wheels for cp311-macosx_arm64	3m 49s
Build wheels for cp311-win_amd64	4m 45s
Build wheels for cp310-manylinux_aarch64	6m 17s
build_pypi_index	8s
build_docker (12)	2m 46s
build_docker (_cu11, 11)	3m 1s
upload_pypi	0s
deploy_pypi_index	0s
Pass testing build wheels	3s
	39m 33s

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