chore(deps): bump go version to v1.26.2

[rohanKanojia]

What does this PR do?

Update Go toolchain to 1.26.2 and use Red Hat UBI9 go-toolset:1.26.2-1779719578

What issues does this PR fix or reference?

Fix #1620

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

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[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: rohanKanojia
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