Fix ticket 8442: detect unselectable switch cases (#8815) #20770

Job	Run time
build_cmake (ubuntu:24.04, true, true)	3m 20s
build_cmake (ubuntu:25.10, true, true)	3m 11s
build_make (ubuntu:24.04)	4m 59s
build_cmake (alpine:3.23, false, false)	4m 55s
build_make (alpine:3.23)	6m 30s
build_make (ubuntu:25.10)	5m 37s
	28m 32s

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