chore: add e2e test to verify scaling behavior

[kondracek-nr]

Description

Right now the e2e tests only check to see if the HPA's condition types ScalingActive and AbleToScale = true. This change actual tests that scaling behavior happens.

Type of change

• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• New feature / enhancement (non-breaking change which adds functionality)
• Security fix
• Bug fix (non-breaking change which fixes an issue)

Checklist:

• Add changelog entry following the contributing guide
• Documentation has been updated
• This change requires changes in testing:
  • unit tests
  • E2E tests

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 1.11%. Comparing base (60fe09e) to head (ddb5ebe).
⚠️ Report is 30 commits behind head on main.

Additional details and impacted files

@@          Coverage Diff          @@
##            main    #479   +/-   ##
=====================================
  Coverage   1.11%   1.11%           
=====================================
  Files         12      12           
  Lines      30787   30787           
=====================================
  Hits         342     342           
  Misses     30440   30440           
  Partials       5       5           

☔ 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.