feat(python): package CUDA as an optional extension #4300

Job	Run time
Python (wheel build)	4m 50s
Rust publish dry-run	26s
Compat check / compat-test	33s
check-java-publish-build (x86_64-unknown-linux-gnu, runs-on=28100615429/runner=amd64-medium/image...	50s
check-java-publish-build (aarch64-unknown-linux-gnu, runs-on=28100615429/runner=arm64-medium/imag...	55s
	7m 34s

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