feat: check for unknown arch for casks #28262

Job	Run time
syntax	42s
vendored gems	46s
cask audit	2m 42s
formula audit	6m 25s
docker	4m 43s
tap syntax	4m 58s
test default formula (Ubuntu 22.04)	4m 10s
test default formula (Ubuntu 20.04)	5m 29s
update-test (Ubuntu 22.04)	23s
tests (online)	9m 1s
test default formula (macOS 13 x86_64)	2m 23s
update-test (macOS 13)	34s
tests (generic OS)	5m 55s
test default formula (macOS 14 arm64)	1m 13s
tests (Ubuntu 22.04)	6m 14s
tests (Ubuntu 20.04)	6m 41s
tests (macOS 13 x86_64)	7m 1s
tests (macOS 14 arm64)	4m 35s
	1h 13m 55s

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