Enable strict typing in FormulaInstaller #30096

Job	Run time
syntax	49s
cask audit	3m 19s
formula audit	7m 16s
tap syntax	4m 58s
test default formula (Ubuntu 22.04)	4m 34s
tests (online)	12m 11s
update-test (Ubuntu 22.04)	25s
vendored gems	44s
update-test (macOS)	23s
test default formula (Ubuntu 20.04)	6m 19s
tests (generic OS)	6m 4s
test default formula (macOS 13 x86_64)	2m 46s
tests (Ubuntu 22.04)	6m 27s
test default formula (macOS 14 arm64)	1m 13s
tests (Ubuntu 20.04)	8m 17s
tests (macOS 13 x86_64)	7m 37s
tests (macOS 14 arm64)	6m 2s
	1h 19m 24s

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