GRUD_DEV-1250/group column permissions

[smnhgn]

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Related Ticket: GRUD_DEV-1250

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Reason for this PR

Anpassungen zur Group-Spalte:

• Entfernt Feld concats aus Group-Spalte
  Bisher enthielt eine Group-Spalte sowohl concats (mit permission) und groups (ohne permissions)
• Fügt den Spalten in groups permissions hinzu

[zingmane]

Evtl. Wäre ein Test noch ganz gut. So sieht's aber gut aus

[github-actions]

Test Results

1 191 tests  +1 191   1 179 ✅ +1 179   3m 55s ⏱️ + 3m 55s
  146 suites +  146      12 💤 +   12 
  146 files   +  146       0 ❌ ±    0 

Results for commit 39e39e1. ± Comparison against base commit 11f54d3.

♻️ This comment has been updated with latest results.