Autogen: Use ADDITIONAL_CLEAN_FILES target property for file cleaning
The `ADDITIONAL_CLEAN_FILES` target property works on multiple generators to remove addition files at the clean target. In `AUTOGEN` use it instead of the deprecated and limited `ADDITIONAL_MAKE_CLEAN_FILES` directory property to remove `AUTOGEN` generated files. Fixes: #17074 "Autogen: clean target with ninja generator doesn’t clean autogen files"
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