Group dependabot updates by package origin

[sebrandon1]

Summary

• Add k8s and openshift groups to consolidate related package updates into single PRs
• Groups k8s.io/* and sigs.k8s.io/* packages together for coordinated updates
• Groups github.com/openshift/* packages together
• Catches remaining dependencies in other-go-modules group

This reduces PR noise and makes dependency updates easier to review.

Related PRs

This change is part of a coordinated effort across multiple OpenShift repositories:

• Group dependabot updates by package origin kube-compare#253
• Group dependabot updates by package origin assisted-service#8716
• Group dependabot updates by package origin #873 (this PR)
• Group dependabot updates by package origin cluster-openshift-apiserver-operator#636
• Group dependabot updates by package origin containernetworking-plugins#221
• Group dependabot updates by package origin ingress-node-firewall#690
• Group dependabot updates by package origin oc-mirror#1336
• Group dependabot updates by package origin pf-status-relay-operator#51

Tracked by: CNFCERT-1301

Test plan

• Verify dependabot.yml syntax is valid
• Wait for next dependabot run to confirm groups are applied correctly

🤖 Generated with Claude Code

[openshift-merge-robot]

PR needs rebase.

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[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: sebrandon1
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[openshift-ci]

@sebrandon1: The following tests 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/build	366f93f	link	true	/test build
ci/prow/test	366f93f	link	true	/test test
ci/prow/lint	366f93f	link	true	/test lint
ci/prow/scan-optional	366f93f	link	false	/test scan-optional
ci/prow/images	366f93f	link	true	/test images
ci/prow/coverage	366f93f	link	true	/test coverage

Full PR test history. Your PR dashboard.

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[sebrandon1]

Closing this PR as the repository already has k8s library grouping configured in the dependabot.yml file.

The current configuration already includes:

• kubernetes group for k8s.io/* and sigs.k8s.io/*
• openshift group for github.com/openshift/*

This PR would be redundant/conflicting with the existing configuration.