feat: add `Type::is_field` and `Type::as_integer` #10539

Job	Run time
build-noir-wasm	3m 51s
build-nargo	2m 46s
build-noirc-abi	1m 25s
build-acvm-js	1m 31s
noirc_abi	1m 32s
ACVM JS (Node.js)	41s
ACVM JS (Browser)	1m 23s
Noir JS	1m 9s
Check external repo - zac-williamson/noir-edwards	8s
noir_codegen	1m 2s
Example scripts	18s
noir_wasm	2m 1s
Integration Tests (Node)	2m 16s
Integration Tests (Browser)	2m 27s
End	1s
	22m 31s

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