Upgrade PMD to 7.7.0 and combine metrics into same plugin executions

[uhafner]

Maven requires that a plugin is only configured once in the POM.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.87%. Comparing base (2d13286) to head (f85e494).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #1206   +/-   ##
=========================================
  Coverage     88.87%   88.87%           
  Complexity      164      164           
=========================================
  Files            11       11           
  Lines           683      683           
  Branches         85       85           
=========================================
  Hits            607      607           
  Misses           59       59           
  Partials         17       17           

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[github-actions]

☀️   Quality Monitor

   🚦   Tests: 98 % successful (✔️ 96 passed, 🙈 2 skipped)
   〰️   Line Coverage: 91% (59 missed lines)
   ➰   Branch Coverage: 91% (19 missed branches)
     Mutation Coverage: 80% (77 survived mutations)
     CheckStyle: No warnings
     PMD: No warnings
     SpotBugs: No bugs
   🐛   Error Prone: No bugs
     OWASP Dependency Check: No vulnerabilitys
   🌀   Cyclomatic Complexity: 355
   💡   Cognitive Complexity: 172
   📝   Non Commenting Source Statements: 1199
   ➿   N-Path Complexity: 432

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Created by Quality Monitor v1.12.0-SNAPSHOT (#e2728ef). More details are shown in the GitHub Checks Result.