chore: update jenkins file to include junit plugin for archiving test results

[ash-thakur-rh]

Description

Fixes #3835

Type of change

• Bug fix (non-breaking change which fixes an issue)
• Feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change
• Chore (non-breaking change which doesn't affect codebase;
  test, version modification, documentation, etc.)

Checklist

• I have read the contributing guidelines
• I signed-off my commit with a user that has signed the Eclipse Contributor Agreement
• My code follows the style guidelines of this project
• I Keep It Small and Simple: The smaller the PR is, the easier it is to review and have it merged
• I use conventional commits in my commit messages
• I have performed a self-review of my code
• I Added CHANGELOG entry
• I have updated the documentation accordingly
• No new bugs, code smells, etc. in SonarCloud report
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I tested my code in Kubernetes
• I tested my code in OpenShift

[manusa]

Eclipse JKube CI Report

Started new GH workflow run for #3850 (2026-02-16T13:25:07Z)

⚙️ JKube E2E Tests (22064440972) ✋

• ✔️ Bootstrap CI test run (#3850)
• ✔️ K8S v1.25.13 dockerfile (#3850)
• ⏳ K8S v1.25.13 other (#3850)
• ✔️ K8S v1.25.13 quarkus (#3850)
• ✔️ K8S v1.25.13 quarkus-native (#3850)
• ✔️ K8S v1.25.13 springboot (#3850)
• ✔️ K8S v1.25.13 webapp (#3850)
• ✔️ K8S v1.28.1 dockerfile (#3850)
• ❌ K8S v1.28.1 other (#3850)
• ✔️ K8S v1.28.1 quarkus (#3850)
• ✔️ K8S v1.28.1 quarkus-native (#3850)
• ✔️ K8S v1.28.1 springboot (#3850)
• ✔️ K8S v1.28.1 webapp (#3850)
• ✋ OpenShift v3.10.0 other (#3850)
• ✋ OpenShift v3.10.0 quarkus (#3850)
• ✋ OpenShift v3.10.0 springboot (#3850)
• ✋ OpenShift v3.10.0 webapp (#3850)
• ✔️ Windows (#3850)

[codecov-commenter]

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 72.28%. Comparing base (1ac4f7c) to head (bb32625).
⚠️ Report is 907 commits behind head on master.
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Additional details and impacted files

@@              Coverage Diff              @@
##             master    #3850       +/-   ##
=============================================
+ Coverage     59.36%   72.28%   +12.92%     
- Complexity     4586     4882      +296     
=============================================
  Files           500      493        -7     
  Lines         21211    19326     -1885     
  Branches       2830     2581      -249     
=============================================
+ Hits          12591    13970     +1379     
+ Misses         7370     4155     -3215     
+ Partials       1250     1201       -49     

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[manusa]

LGTM, thx!