chore: lock CI to use ubuntu 22.04 #16544

Job	Run time
build-acvm-js	1m 21s
build-nargo	2m 23s
build-noirc-abi	1m 10s
build-noir-wasm	3m 40s
Load critical library list	4s
yarn-lock	1m 6s
noirc_abi	1m 23s
ACVM JS (Node.js)	38s
ACVM JS (Browser)	1m 32s
noir_codegen	1m 5s
Example scripts	18s
Noir JS	1m 1s
Check external repo - ${{ matrix.project.repo }}	0s
Integration Tests (Browser)	1m 56s
Integration Tests (Node)	2m 16s
noir_wasm	1m 59s
End	1s
	21m 53s

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