Add PHP8.3 support

[JohannesGGE]

Fix: #5507

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (0581fd9) 22.28% compared to head (8c6431e) 24.83%.
Report is 6 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #5542      +/-   ##
============================================
+ Coverage     22.28%   24.83%   +2.55%     
  Complexity      388      388              
============================================
  Files           240      240              
  Lines         11793    10568    -1225     
  Branches       2301     1708     -593     
============================================
- Hits           2628     2625       -3     
+ Misses         9165     7943    -1222     

Flag	Coverage Δ
javascript	15.80% <ø> (+1.97%)	⬆️
php	63.27% <ø> (-0.03%)	⬇️

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see 95 files with indirect coverage changes

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[ChristophWurst]

PHPUnit output is clean

[github-actions]

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