split the actual check implementations from the instances #19808

Job	Run time
build_cmake (ubuntu:24.04, true, true)	3m 36s
build_make (ubuntu:25.10)	3m 56s
build_make (alpine:3.23)	5m 59s
build_cmake (ubuntu:25.10, true, true)	3m 5s
build_cmake (alpine:3.23, false, false)	4m 13s
build_make (ubuntu:24.04)	2m 54s
	23m 43s

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