formula: fix alias/generic/prepend std_cmake_args issue. #30259

Job	Run time
syntax	43s
formula audit	31s
tap syntax	31s
tests (online)	30s
vendored gems	44s
tests (generic OS)	28s
cask audit	44s
tests (Ubuntu 22.04)	29s
tests (Ubuntu 20.04)	30s
test default formula (Ubuntu 22.04)	29s
tests (macOS 13 x86_64)	30s
update-test (Ubuntu 22.04)	24s
test default formula (Ubuntu 20.04)	30s
update-test (macOS)	26s
tests (macOS 14 arm64)	39s
test default formula (macOS 13 x86_64)	42s
test default formula (macOS 14 arm64)	44s
	9m 34s

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