🐛⚗️: Traefik V3 syntax fixes

[mrnicegyu11]

What do these changes do?

Fixes for bugs that surfaced on the Dev-servers after the traefik major version upgrade to v3

Related issue/s

How to test

Dev-ops checklist

• No ENV changes or I properly updated ENV (read the instruction)

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.8%. Comparing base (cafbf96) to head (108001c).
Report is 475 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##           master   #6257      +/-   ##
=========================================
+ Coverage    84.5%   88.8%    +4.2%     
=========================================
  Files          10    1349    +1339     
  Lines         214   56417   +56203     
  Branches       25    1398    +1373     
=========================================
+ Hits          181   50126   +49945     
- Misses         23    6089    +6066     
- Partials       10     202     +192     

Flag	Coverage Δ
integrationtests	64.8% <ø> (?)
unittests	86.6% <ø> (+2.0%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
...ules/dynamic_sidecar/docker_service_specs/proxy.py	100.0% <ø> (ø)

... and 1298 files with indirect coverage changes