ci: test symfony 7.3

[DjordyKoert]

Description

Run CI for Symfony 7.3

What type of PR is this? (check all applicable)

• Bug Fix
• Feature
• Refactor
• Deprecation
• Breaking Change
• Documentation Update
• CI

Checklist

• I have made corresponding changes to the documentation (docs/)
• I have made corresponding changes to the changelog (CHANGELOG.md)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.25%. Comparing base (c7797a9) to head (e16e908).
⚠️ Report is 1 commits behind head on 5.x.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##              5.x    #2541   +/-   ##
=======================================
  Coverage   96.25%   96.25%           
=======================================
  Files          93       93           
  Lines        2966     2966           
=======================================
  Hits         2855     2855           
  Misses        111      111           

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