feat: implement `ops` traits on `u16`/`i16` #6777

Job	Run time
build-nargo	2m 24s
build-noirc-abi	2m 11s
build-acvm-js	1m 30s
build-noir-wasm	3m 52s
ACVM JS (Browser)	1m 26s
ACVM JS (Node.js)	48s
noir-js-backend-barretenberg	45s
noirc_abi	1m 18s
noir_codegen	1m 9s
Noir JS	1m 31s
noir_wasm	1m 46s
Integration Tests (Browser)	6m 4s
Integration Tests (Node)	3m 57s
End	1s
	28m 42s

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