fix: remove panic from `init_log_level` in `acvm_js` #2973

Job	Run time
build-acvm-js	4m 34s
build-nargo	2m 17s
build-noirc-abi	4m 33s
build-noir-wasm	2m 26s
noirc_abi	41s
noir-js-backend-barretenberg	50s
ACVM JS (Node.js)	43s
Noir JS	1m 33s
ACVM JS (Browser)	1m 27s
noir_codegen	1m 10s
Integration Tests	9m 33s
noir_wasm	1m 8s
End	1s
	30m 56s

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