[Edge]Migrate Kostal reference target

[hvgollar]

• Migrate Kostal Piko (ESS, Charger, Grid Meter) and Plenticore (ESS, PV Inverter, Grid Meter) from 'updateReferenceFilter' / Modbus ConfigAdmin targeting to '@GenerateTargetsFromReferences'.
• Drop obsolete 'Modbus_target' and update unit tests to JUnit Jupiter.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #3916      +/-   ##
=============================================
+ Coverage      55.66%   55.68%   +0.02%     
+ Complexity     19020    19014       -6     
=============================================
  Files           3670     3670              
  Lines         171408   171396      -12     
  Branches       14094    14089       -5     
=============================================
+ Hits           95405    95419      +14     
+ Misses         72249    72225      -24     
+ Partials        3754     3752       -2     

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