Improve/fix HOMEBREW_FORBIDDEN_LICENSES handling #30809

Job	Run time
syntax	48s
formula audit	4m 42s
cask audit	2m 25s
tap syntax	6m 12s
test default formula (Ubuntu 22.04)	1m 29s
vendored gems	45s
test default formula (Ubuntu 20.04)	3m 0s
update-test (Ubuntu 22.04)	30s
test default formula (macOS 13 x86_64)	4m 23s
tests (online)	5m 53s
update-test (macOS)	24s
test default formula (macOS 15 arm64)	1m 14s
tests (generic OS)	3m 1s
tests (Ubuntu 22.04)	3m 14s
tests (Ubuntu 20.04)	4m 2s
tests (macOS 13 x86_64)	7m 24s
tests (macOS 15 arm64)	4m 46s
	54m 12s

Provide feedback