chore: Release Noir(0.21.0) #340

Job	Run time
build-noir-wasm	14m 46s
build-acvm-js	13m 17s
build-nargo	2m 22s
build-noirc-abi	13m 5s
source-resolver	29s
noir-js-backend-barretenberg	28s
noirc_abi	22s
ACVM JS (Browser)	3m 48s
ACVM JS (Node.js)	21s
noir_codegen	48s
Noir JS	1m 21s
Integration Tests	8m 24s
noir_wasm	46s
End	1s
	1h 0m 18s

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