MGMT-22731: Add To Renovate Tool - Update UBI-minimal Version Automatically

[shay23bra]

Update renovate tool to be able to update UBI images

[openshift-ci-robot]

@shay23bra: This pull request references MGMT-22731 which is a valid jira issue.

Warning: The referenced jira issue has an invalid target version for the target branch this PR targets: expected the task to target the "4.22.0" version, but no target version was set.

Details

In response to this:

Update renovate tool to be able to update UBI images

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[coderabbitai]

Walkthrough

The renovate.json configuration is updated to add a custom regex manager for tracking ubi-minimal Docker image digests from Red Hat, introduce a "UBI Runtime Images" grouping with "ubi" label via packageRules, and disable major version updates for the ubi-minimal image.

Changes

Cohort / File(s)	Summary
Renovate Configuration renovate.json	Added custom regex manager to parse Docker image digests for ubi-minimal; introduced packageRule grouping "UBI Runtime Images" with "ubi" label; configured rule to disable major updates for ubi-minimal image; enabled new manager alongside existing dockerfile manager (+37/-1)

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

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[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: shay23bra
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[openshift-ci]

@shay23bra: The following test 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/e2e-ai-operator-ztp-capi	8e76ef3	link	true	/test e2e-ai-operator-ztp-capi

Full PR test history. Your PR dashboard.

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