feat(python): package CUDA as an optional extension #32471

Job	Run time
Rust build (wasm32 with default features)	59s
Check build with minimal dependencies	2m 10s
C API test build	44s
Rust (lint, no default)	2m 30s
Python (lint)	42s
License Check and Audit Check (advisories)	51s
lint-toml	7s
WASM integration smoke test	5m 28s
Rust build (with tokio dispatcher)	55s
Rust build (all-features)	2m 51s
C++ build	1m 22s
Rust build (default features)	2m 40s
Java	2m 33s
License Check and Audit Check (bans licenses sources)	57s
Check generated source files are up to date	45s
validate-workflow-yaml	7s
Python (test)	2m 17s
C/C++ (lint)	6s
Mirror DuckDB to R2 / Resolve DuckDB version and check R2	7s
Mirror DuckDB to R2 / Mirror DuckDB ${{ matrix.archive }} to R2	-1s
DuckDB libraries available in R2	4s
Rust tests (windows-x64)	8m 6s
Rust tests (linux-arm64)	4m 38s
Rust (lint)	2m 16s
SQL logic tests	1m 45s
Rust (docs)	2m 46s
	47m 45s

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