NO-ISSUE chore: bump builder image to golang 1.25 / openshift 4.21

[copejon]

Update golang build image

Summary by CodeRabbit

• Chores
  • Updated build toolchain configuration for RPM builds: Go upgraded from version 1.24 to 1.25 and OpenShift components updated from version 4.20 to 4.21.

[coderabbitai]

📝 Walkthrough

Walkthrough

Updated the RPM builder base image tag from Go 1.24/OpenShift 4.20 to Go 1.25/OpenShift 4.21, changing the toolchain versions used during RPM build operations.

Changes

Cohort / File(s)	Summary
Build Configuration Makefile	Updated RPM_BUILDER_IMAGE_TAG variable to use newer Go and OpenShift versions in the builder image.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Title check	✅ Passed	The title clearly and specifically describes the main change: updating the builder image to use golang 1.25 and openshift 4.21, which matches the Makefile variable update.

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✨ Finishing Touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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[pacevedom]

Good catch! Just one minor nit.

[pacevedom]

Suggested change

	RPM_BUILDER_IMAGE_TAG := rhel-9-golang-1.25-openshift-4.21
	RPM_BUILDER_IMAGE_TAG := rhel-9-golang-1.25-openshift-4.22

[ggiguash]

The fix will be merged in #6243
/close

[openshift-ci]

@ggiguash: Closed this PR.

Details

In response to this:

The fix will be merged in #6243
/close

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