[Release 1.35] Update Traefik version to v3.6.7

[manuelbuil]

Issue: #13477
Backport: #13474

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 21.47%. Comparing base (d8067c1) to head (3e21b03).
⚠️ Report is 2 commits behind head on release-1.35.

Additional details and impacted files

@@               Coverage Diff                @@
##           release-1.35   #13484      +/-   ##
================================================
+ Coverage         21.45%   21.47%   +0.01%     
================================================
  Files               190      190              
  Lines             15480    15480              
================================================
+ Hits               3322     3325       +3     
+ Misses            11705    11702       -3     
  Partials            453      453              

Flag	Coverage Δ
unittests	21.47% <ø> (+0.01%)	⬆️

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