switch GarageDoor to LeakageSemantics #791

Job	Run time
docker-master	1h 30m 23s
publish-standalone-dry-run	15s
test-standalone (master, dev, default)	1m 30s
build-wasm-of-ocaml (master, 4.14.1)	17m 7s
build-js-of-ocaml (master, 4.11.1)	5m 38s
generated-files (master)	23m 50s
standalone-haskell (master)	47m 7s
test-amd64	2h 19m 56s
validate-docker-master	2m 22s
deploy-js-wasm-of-ocaml	33s
docker-check-all	1s
	5h 28m 42s

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