feat: support cfg(feature = "name") attributes #20827

Job	Run time
build-acvm-js	1m 22s
build-nargo	1m 38s
build-noirc-abi	1m 15s
build-noir-wasm	2m 1s
Load critical library list	7s
yarn-lock	1m 19s
noirc_abi	40s
ACVM JS (Browser)	33s
ACVM JS (Node.js)	33s
Noir JS	1s
Example scripts	1s
Compile `noir-contracts` zero inliner aggressiveness	1s
Check external repo - ${{ matrix.repo }}/${{ matrix.path }}	1s
noir_codegen	1s
Upload critical library report	8s
Integration Tests (Browser)	1s
noir_wasm	1s
Integration Tests (Node)	1s
End	1s
	9m 45s

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