Bump `starknet` to `0.12.0` #8487

Job	Run time
build	16m 26s
cairofmt	5s
clippy	12m 25s
docs	14m 1s
dojo-world-bindings-check	10m 57s
ensure-wasm	7m 52s
fmt	2m 23s
dojo-spawn-and-move-example-test	2m 7s
test-hurl	2m 23s
dojo-core-test	3m 12s
ensure-docker	14s
ensure-windows	16m 6s
test	19m 14s
	1h 47m 25s

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