ALEPH-603 Add test for HaProxy custom domains

[olethanh]

Add test for HaProxy custom domains

Based on PR #822

Related ClickUp, GitHub or Jira tickets : ALEPH-603

[codecov]

Codecov Report

Attention: Patch coverage is 93.75000% with 4 lines in your changes missing coverage. Please review.

Project coverage is 64.84%. Comparing base (3a7c8ff) to head (7003b5d).
Report is 12 commits behind head on ol-haproxy-debug-fix.

Files with missing lines	Patch %	Lines
tests/supervisor/test_haproxy.py	93.75%	2 Missing and 2 partials ⚠️

Additional details and impacted files

@@                   Coverage Diff                    @@
##           ol-haproxy-debug-fix     #824      +/-   ##
========================================================
+ Coverage                 63.74%   64.84%   +1.10%     
========================================================
  Files                        86       87       +1     
  Lines                      7951     8015      +64     
  Branches                    710      714       +4     
========================================================
+ Hits                       5068     5197     +129     
+ Misses                     2671     2585      -86     
- Partials                    212      233      +21     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.