feat: support cfg(feature = "name") attributes #18780

Job	Run time
yarn-lock	1m 18s
build-nargo	1m 21s
build-noirc-abi	1m 14s
build-noir-wasm	3m 42s
build-acvm-js	1m 32s
Load critical library list	3s
noirc_abi	1m 45s
Example scripts	0s
Check external repo - ${{ matrix.project.repo }}/${{ matrix.project.path }}	0s
ACVM JS (Node.js)	43s
ACVM JS (Browser)	1m 52s
noir_codegen	0s
Noir JS	0s
Integration Tests (Browser)	1m 47s
Integration Tests (Node)	0s
noir_wasm	0s
End	1s
	15m 18s

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