As @AutoConfiguration is now meta-annotated with @AutoConfigureAfter
and @AutoConfigureBefore, the generated property files have a lot of
superfluous lines in the format <class>.AutoConfigureAfter= and
<class>.AutoConfigureBefore=.
One can now configure in the annotation processor for each property key
if empty values should be omitted. This is currently only activated for
AutoConfigureAfter and AutoConfigureBefore
See gh-29907
fd36215d72