ROX-35079: drop Application from the central chart

[porridge]

Description

This API is effectively abandoned, and the only OpenShift ecosystem consumer - RH ACM - has deprecated functionality related to this API in 2025 and is likely to stop shipping the app.k8s.io CRD soon.

• this PR stops installing the Application resource, targeted for the next release
• ROX-35619: Prune app.k8s.io/Application when API is gone #21583 prepares ACS for the disappearance of the API on existing clusters (to be backported to older releases too)

User-facing documentation

• CHANGELOG.md is updated OR update is not needed
• documentation PR is created and is linked above OR is not needed

Testing and quality

• the change is production ready: the change is GA, or otherwise the functionality is gated by a feature flag
• CI results are inspected

Automated testing

• not modified existing tests, this is apparently untested functionality being removed

How I validated my change

N/A

[openshift-ci]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[porridge]

/test all

[coderabbitai]

📝 Walkthrough

Walkthrough

This PR removes the Helm render APIVersions override path and updates test suites to stop injecting app.k8s.io/v1beta1/Application into Helm capabilities. The central chart’s Application template is also removed.

Changes

Remove Application Resource and APIVersions Override

Layer / File(s)	Summary
Remove APIVersions field and rendering logic pkg/helm/util/render.go	Removes the APIVersions field from Options and the logic in Render that copied it into chartutil.Capabilities; capabilities now use the default version set.
Remove APIVersions overrides from test suites pkg/helm/charts/tests/centralservices/base_suite_test.go, pkg/helm/charts/tests/securedclusterservices/base_suite_test.go, pkg/helm/config/roundtrip_test.go	Removes ReleaseOptions.APIVersions overrides from three Helm test setups.
Remove Application Helm template image/templates/helm/stackrox-central/templates/00-stackrox-application.yaml	Removes the central chart template that rendered the app.k8s.io/v1beta1 Application resource.

Estimated code review effort: 2 (Simple) | ~10 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title clearly states the main change: removing the Application resource from the central chart.
Description check	✅ Passed	The PR description covers the change, docs, testing, and validation sections, with only CI inspection left unchecked.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch porridge/ROX-35079-drop

---

_{Comment @coderabbitai help to get the list of available commands.}

[github-actions]

🚀 Build Images Ready

Images are ready for commit a6d4e2a. To use with deploy scripts:

export MAIN_IMAGE_TAG=4.12.x-406-ga6d4e2a609

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 50.33%. Comparing base (f5fa85c) to head (08b3836).
⚠️ Report is 4 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #21585      +/-   ##
==========================================
- Coverage   50.37%   50.33%   -0.04%     
==========================================
  Files        2844     2844              
  Lines      218473   218470       -3     
==========================================
- Hits       110058   109976      -82     
- Misses     100432   100494      +62     
- Partials     7983     8000      +17     

Flag	Coverage Δ
go-unit-tests	50.33% <ø> (-0.04%)	⬇️

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[porridge]

/retest

[openshift-ci]

@porridge: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/ocp-4-21-qa-e2e-tests	08b3836	link	false	/test ocp-4-21-qa-e2e-tests

Full PR test history. Your PR dashboard.

Details

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[porridge]

Actually this needs to wait until after we deprecate this. Closing (at least for now).