Recover from uninstalled gems in launcher mode #11950

Job	Run time
lint_node	28s
lint_ruby	21s
build_node (ubuntu-latest)	2m 6s
Ruby 3.1 on ubuntu-latest	11m 44s
spelling	15s
build_node (macos-latest)	2m 44s
Ruby 3.2 on ubuntu-latest	10m 50s
Verify Jekyll website builds	8s
build_node (windows-latest)	6m 49s
Ruby 3.3 on ubuntu-latest	9m 34s
Ruby 3.1 on macos-latest	6m 46s
Ruby 3.2 on macos-latest	6m 54s
Ruby 3.3 on macos-latest	5m 58s
Ruby 3.1 on windows-latest	19m 57s
Ruby 3.2 on windows-latest	20m 11s
Ruby 3.3 on windows-latest	20m 42s
	2h 5m 27s

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