Use auto vs auto * where it's possible

2 jobs for master in 10 minutes and 7 seconds (queued for 37 minutes and 52 seconds)
Status Job ID Name Coverage
  Build
failed #90318
build_clazy_clang_tidy

00:05:58

passed #90317
linux kf5-qt5 qt5.15

00:04:09

60.0%
 
Name Stage Failure
failed
build_clazy_clang_tidy Build
make[2]: *** [src/CMakeFiles/KF5AlarmCalendar.dir/build.make:313: bin/libKF5AlarmCalendar.so.5.16.40] Error 1
make[1]: *** [CMakeFiles/Makefile2:217: src/CMakeFiles/KF5AlarmCalendar.dir/all] Error 2
make: *** [Makefile:160: all] Error 2
Uploading artifacts for failed job
Uploading artifacts...
WARNING: JUnitTestResults.xml: no matching files
ERROR: No files to upload
Cleaning up file based variables
ERROR: Job failed: exit code 1