🐛 Discover service namespace in e2e metrics tests

[pedjak]

Description

Previously, the metrics test assumed the service was in a hardcoded
namespace. This change queries for the service across all namespaces
to find its actual location, making the test more robust against various
deployment configurations.

Reviewer Checklist

• API Go Documentation
• Tests: Unit Tests (and E2E Tests, if appropriate)
• Comprehensive Commit Messages
• Links to related GitHub Issue(s)

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[tmshort]

/approve

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: tmshort

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 69.61%. Comparing base (ba665c7) to head (7a7bbbf).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2437      +/-   ##
==========================================
+ Coverage   69.58%   69.61%   +0.02%     
==========================================
  Files         100      100              
  Lines        7641     7641              
==========================================
+ Hits         5317     5319       +2     
+ Misses       1889     1888       -1     
+ Partials      435      434       -1     

Flag	Coverage Δ
e2e	46.76% <ø> (+0.02%)	⬆️
experimental-e2e	13.68% <ø> (ø)
unit	57.11% <ø> (ø)

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[oceanc80]

/lgtm

[camilamacedo86]

It seems fine for me