feat: run tests in parallel in `nargo test` #4529

Job	Run time
build-noirc-abi	2m 23s
build-acvm-js	2m 18s
build-noir-wasm	2m 39s
build-nargo	2m 21s
ACVM JS (Browser)	2m 50s
ACVM JS (Node.js)	33s
noir-js-backend-barretenberg	51s
noirc_abi	47s
Noir JS	1m 24s
noir_codegen	1m 3s
Integration Tests (Browser)	5m 8s
Integration Tests (Node)	3m 37s
noir_wasm	1m 7s
End	1s
	27m 2s

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