Sync extra cmake from upstream KDE and KDAB #66

Job	Run time
build (ubuntu-22.04, Debug, static, 5.15)	3m 17s
build (ubuntu-22.04, Debug, static, 6.5.*)	5m 11s
build (ubuntu-22.04, Debug, shared, 5.15)	3m 23s
build (ubuntu-22.04, Debug, shared, 6.5.*)	5m 15s
build (ubuntu-22.04, Release, static, 5.15)	1m 6s
build (ubuntu-22.04, Release, static, 6.5.*)	1m 27s
build (ubuntu-22.04, Release, shared, 5.15)	1m 1s
build (ubuntu-22.04, Release, shared, 6.5.*)	1m 20s
build (windows-2022, Debug, static, 5.15)	14m 42s
build (windows-2022, Debug, static, 6.5.*)	17m 0s
build (windows-2022, Debug, shared, 5.15)	14m 53s
build (windows-2022, Debug, shared, 6.5.*)	17m 11s
build (windows-2022, Release, static, 5.15)	2m 11s
build (windows-2022, Release, static, 6.5.*)	3m 8s
build (windows-2022, Release, shared, 5.15)	2m 38s
build (windows-2022, Release, shared, 6.5.*)	2m 49s
build (macos-12, Debug, static, 5.15)	3m 4s
build (macos-12, Debug, static, 6.5.*)	4m 4s
build (macos-12, Debug, shared, 5.15)	3m 24s
build (macos-12, Debug, shared, 6.5.*)	4m 50s
build (macos-12, Release, static, 5.15)	3m 3s
build (macos-12, Release, static, 6.5.*)	2m 20s
build (macos-12, Release, shared, 5.15)	2m 1s
build (macos-12, Release, shared, 6.5.*)	1m 35s
	2h 0m 53s

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