Activate ErrorProne reporting in QualityMonitor

[uhafner]

Also run SpotBugs only once with the check goal.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

❗ No coverage uploaded for pull request base (main@5b8b36c). Click here to learn what that means.
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1013   +/-   ##
=======================================
  Coverage        ?   88.98%           
  Complexity      ?      181           
=======================================
  Files           ?       11           
  Lines           ?      717           
  Branches        ?       93           
=======================================
  Hits            ?      638           
  Misses          ?       62           
  Partials        ?       17           

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[github-actions]

☀️   Quality Monitor

   🚦   Tests: 98 % successful (✔️ 95 passed, 🙈 2 skipped)
   〰️   Line Coverage: 91% (62 missed lines)
   ➰   Branch Coverage: 92% (19 missed branches)
     Mutation Coverage: 80% (75 survived mutations)
     CheckStyle: No warnings found
     PMD: No warnings found
     SpotBugs: No warnings found

Created by Quality Monitor v1.8.2 (#d626b05). More details are shown in the GitHub Checks Result.