fix: error on duplicate struct field #10064

Job	Run time
build-nargo	2m 34s
build-noirc-abi	1m 44s
build-acvm-js	1m 35s
build-noir-wasm	4m 2s
ACVM JS (Node.js)	36s
ACVM JS (Browser)	2m 4s
noirc_abi	1m 13s
noir_codegen	59s
Example scripts	19s
Check external repo - zac-williamson/noir-edwards	9s
Noir JS	1m 12s
noir_wasm	2m 42s
Integration Tests (Browser)	2m 2s
Integration Tests (Node)	2m 22s
End	1s
	23m 34s

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