Add feature flag support to GlobalState #11474

Job	Run time
build_node (ubuntu-latest)	1m 41s
Ruby 3.1 on ubuntu-latest	18m 15s
lint_node	41s
build_node (macos-latest)	1m 46s
Ruby 3.2 on ubuntu-latest	15m 18s
build_node (windows-latest)	7m 21s
Ruby 3.3 on ubuntu-latest	10m 8s
spelling	12s
lint_ruby	26s
Ruby 3.1 on macos-latest	9m 17s
Verify Jekyll website builds	13s
Ruby 3.2 on macos-latest	8m 44s
Ruby 3.3 on macos-latest	7m 53s
Ruby 3.1 on windows-latest	23m 42s
Ruby 3.2 on windows-latest	22m 28s
Ruby 3.3 on windows-latest	24m 17s
	2h 32m 22s

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