fix: error on unbound generics in structs (#5619) #10404

Job	Run time
build-noirc-abi	1m 29s
build-nargo	2m 35s
build-acvm-js	1m 23s
build-noir-wasm	4m 8s
ACVM JS (Browser)	1m 9s
ACVM JS (Node.js)	34s
noirc_abi	1m 16s
Example scripts	17s
Check external repo - zac-williamson/noir-edwards	9s
noir_codegen	1m 19s
Noir JS	1m 9s
Integration Tests (Browser)	1m 51s
noir_wasm	1m 44s
Integration Tests (Node)	2m 22s
End	1s
	21m 26s

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