fix: migrate autobump jobs to GitHub App auth

[Prucek]

Summary

• Switch release-bumper and ci-tools-bumper periodic jobs from openshift-bot OAuth token to openshift-prow-github-app GitHub App credentials
• Pass --github-app-id and --github-app-private-key-path args to generic-autobumper and update volume/secret references accordingly
• Update bumper configs to use openshift-ci[bot] identity and remove deprecated gitHubToken/gitHubLogin fields

🤖 Generated with Claude Code

Summary by CodeRabbit

This PR migrates the OpenShift CI infrastructure's automated dependency bumper jobs from OAuth token authentication to GitHub App authentication.

Infrastructure Changes:

• Release Bumper Job (_release-bumper.yaml): Updates the automated release repository bumper to use the openshift-ci[bot] GitHub App identity instead of the legacy openshift-bot OAuth credentials. This service periodically updates upstream Prow, Boskos, and TestInfra image references in the OpenShift release repository.

• CI Tools Bumper Job (_ci-tools-bumper.yaml): Similarly migrates the CI tools repository bumper to the new GitHub App identity for automated updates to cluster initialization manifests and integration test configurations.

Key Updates:

• Replaces hardcoded openshift-bot credentials with the openshift-ci[bot] GitHub App account
• Sets explicit gitHubOrg: "openshift" configuration in both bumper definitions
• Removes deprecated OAuth token field references (gitHubToken, gitHubLogin)
• Maintains all existing bumper configurations (repo targets, image prefixes, PR assignments to openshift/test-platform)

This change modernizes the authentication mechanism for these critical infrastructure jobs, aligning them with GitHub App-based authentication standards while preserving their operational behavior.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Repository YAML (base), Central YAML (inherited)

Review profile: CHILL

Plan: Enterprise

Run ID: 3d3033c2-5f5d-4d28-ac78-f0e8457e9886

📥 Commits

Reviewing files that changed from the base of the PR and between 5994c08 and 8b28635.

⛔ Files ignored due to path filters (1)

• ci-operator/jobs/infra-periodics.yaml is excluded by !ci-operator/jobs/**

📒 Files selected for processing (2)

• core-services/prow/02_config/_ci-tools-bumper.yaml
• core-services/prow/02_config/_release-bumper.yaml

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Walkthrough

Two Prow bumper configuration files update their bot identity and credentials. CI tools bumper and release bumper YAML configurations replace the openshift-bot identity and /etc/github/oauth token references with openshift-ci[bot] name/email and openshift GitHub organization.

Changes

Bot identity migration in bumper configs

Layer / File(s)	Summary
Bot identity migration in bumper configs core-services/prow/02_config/_ci-tools-bumper.yaml, core-services/prow/02_config/_release-bumper.yaml	Both bumper configurations update Git identity from openshift-bot to openshift-ci[bot], add gitHubOrg: openshift, and remove deprecated gitHubToken and gitHubLogin credential fields.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Possibly related PRs

• openshift/release#79805: Both PRs modify the same Prow bumper YAML identity/auth fields in core-services/prow/02_config/_ci-tools-bumper.yaml and _release-bumper.yaml (switching bot identity and GitHub auth/token configuration).

Suggested labels

lgtm, rehearsals-ack

Suggested reviewers

• danilo-gemoli

🚥 Pre-merge checks | ✅ 15

✅ Passed checks (15 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes the main change: migrating autobump jobs from OAuth token authentication to GitHub App authentication, which is the core objective of this pull request.
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.
Stable And Deterministic Test Names	✅ Passed	PR modifies only CI configuration YAML files, not Ginkgo test code. No test names to evaluate against stability requirements.
Test Structure And Quality	✅ Passed	Check not applicable: PR contains only YAML configuration changes for Prow CI tools bumper jobs, with no Ginkgo test code added or modified.
Microshift Test Compatibility	✅ Passed	PR modifies only Prow CI configuration files (_ci-tools-bumper.yaml and _release-bumper.yaml), not Ginkgo e2e tests. MicroShift compatibility check applies only to new test code.
Single Node Openshift (Sno) Test Compatibility	✅ Passed	PR only modifies Prow CI configuration files (YAML), not adding any Ginkgo e2e tests. The check is for new e2e tests only, making it not applicable here.
Topology-Aware Scheduling Compatibility	✅ Passed	PR modifies Prow CI config files updating authentication credentials. No deployment manifests, operator code, controllers, or scheduling constraints—check not applicable.
Ote Binary Stdout Contract	✅ Passed	PR changes only YAML configuration files for Prow autobumper tools, not process-level Go code; OTE stdout contract check is not applicable to configuration-only changes.
Ipv6 And Disconnected Network Test Compatibility	✅ Passed	PR modifies only YAML configuration files for CI job credentials, not Ginkgo e2e tests. The IPv6 compatibility check applies only to new test code, which is absent here.
No-Weak-Crypto	✅ Passed	No weak crypto in this PR. Migrated from OAuth tokens to GitHub App auth with secure PEM private keys mounted as read-only secrets. No MD5, SHA1, DES, RC4, 3DES, Blowfish, or ECB usage.
Container-Privileges	✅ Passed	PR modifies data configuration files only. Container job specs lack privileged: true, hostPID, hostNetwork, hostIPC, SYS_ADMIN, allowPrivilegeEscalation: true, or root user settings.
No-Sensitive-Data-In-Logs	✅ Passed	PR removes insecure OAuth token references and switches to GitHub App auth. Configuration files contain no exposed passwords, tokens, or API keys—only secure Kubernetes secret references.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Prucek

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Details

Needs approval from an approver in each of these files:

• ci-operator/jobs/OWNERS [Prucek]
• core-services/prow/02_config/OWNERS [Prucek]

Approvers can indicate their approval by writing /approve in a comment
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[openshift-merge-bot]

[REHEARSALNOTIFIER]
@Prucek: no rehearsable tests are affected by this change

Note: If this PR includes changes to step registry files (ci-operator/step-registry/) and you expected jobs to be found, try rebasing your PR onto the base branch. This helps pj-rehearse accurately detect changes when the base branch has moved forward.

[Prucek]

/hold

[openshift-ci]

@Prucek: all tests passed!

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