fix: allow abi encoding arrays of structs from JS #1229

Job	Run time
build-nargo	2m 5s
build-noir-wasm	4m 59s
build-acvm-js	3m 16s
build-noirc-abi	3m 17s
ACVM JS (Node.js)	32s
ACVM JS (Browser)	1m 5s
noirc_abi	42s
noir-js-backend-barretenberg	47s
noir_codegen	56s
Noir JS	1m 36s
noir_wasm	48s
Integration Tests	8m 50s
End	1s
	28m 54s

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