AUTOMOC use moc --version or another approach instead of the _VERSION variables

Error:

[cmake] CMake Warning (dev) in SerAr/components/QtUI/CMakeLists.txt:
[cmake]   AUTOGEN: No valid Qt version found for target QtUI.  AUTOMOC disabled.
[cmake]   Consider adding:
[cmake] 
[cmake]     find_package(Qt5 COMPONENTS Core)
[cmake] 
[cmake]   to your CMakeLists.txt file.

although

[cmake] -- The following REQUIRED packages have been found:
[cmake] 
[cmake]  *
....
[cmake]  * Qt5Core
[cmake]  * Qt5Widgets
[cmake]  * Qt5Gui
[cmake]  * Qt5
...

Reason for error: Qt5Core_(MAJOR|MINOR)_VERSION are not defined in the scope of the target.

Qt provides targets for moc etc (Qt5::moc) instead of using the _VERSION variables I would expect at least a fallback to moc --version if the target is available or if AUTOMOC_EXECUTABLE is set to an appropriate value

related issue #19167 (closed)