Make player groups checks declarative and part of the entity lifecycle

[tudddorrr]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
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⚠️ Report is 3 commits behind head on develop.

Additional details and impacted files

@@            Coverage Diff             @@
##             develop     #588   +/-   ##
==========================================
  Coverage           ?   99.39%           
==========================================
  Files              ?      208           
  Lines              ?    14451           
  Branches           ?     1282           
==========================================
  Hits               ?    14363           
  Misses             ?       86           
  Partials           ?        2           

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