chore(deps): bump go version to v1.26.7

[rohanKanojia]

What does this PR do?

• Bump Go toolchain from 1.26.5 to 1.26.7 ingo.mod, CI workflows, and OCI Dockerfile
• Update UBI9 go-toolset builder images to 1.26.7-1789040808

What issues does this PR fix or reference?

Is it tested? How?

PR Checklist

• E2E tests pass (when PR is ready, comment /test v8-devworkspace-operator-e2e, v8-che-happy-path to trigger)
  • v8-devworkspace-operator-e2e: DevWorkspace e2e test
  • v8-che-happy-path: Happy path for verification integration with Che

Summary by CodeRabbit

• Chores
  • Updated the project’s Go toolchain from 1.26.5 to 1.26.7 across development, testing, release, and build environments.
  • Refreshed associated builder images and integrity checks to match the updated toolchain.

[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

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Advanced

Run ID: e5c47486-e8dd-40a1-a412-42147d4318db

📥 Commits

Reviewing files that changed from the base of the PR and between 82828bf and 215c197.

📒 Files selected for processing (7)

• .ci/oci.Dockerfile
• .github/workflows/code-coverage.yml
• .github/workflows/pr.yml
• .github/workflows/release.yml
• build/Dockerfile
• go.mod
• project-clone/Dockerfile

Included review availability: Your plan provides up to 1 included review per hour; 0 remain after this review.

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📝 Walkthrough

Walkthrough

The pull request updates Go from 1.26.5 to 1.26.7 in go.mod, container images, and GitHub Actions workflows. The updated container references include new build identifiers and SHA256 digests.

Changes

Go toolchain update

Layer / File(s)	Summary
Toolchain baseline go.mod, .ci/oci.Dockerfile	The declared Go toolchain and OCI image installation references now use Go 1.26.7.
Build and CI toolchain wiring build/Dockerfile, project-clone/Dockerfile, .github/workflows/*.yml	Builder images and workflow setup steps now use Go 1.26.7. The builder image references include updated build identifiers and SHA256 digests.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~5 minutes

Change: Other

Merge Risk: ⚪ Minimal · up to 215c1

The toolchain references are consistently updated to Go 1.26.7, with no unresolved merge-blocking issue identified.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: updating the Go toolchain to version 1.26.7 across project configuration, CI workflows, and build images.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
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.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

Warning

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[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dkwon17, rohanKanojia

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Needs approval from an approver in each of these files:

• OWNERS [dkwon17]

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