Kaniko v1.25.19 moves away from end-of-life UBI 7

The chainguard-dev/kaniko project has released version v1.25.19, as noted in its GitHub release notes. This update includes a change to the integration tests, specifically moving the issue-1039 fixture off the end-of-life UBI 7 base image. Additionally, a fix was implemented to ensure each layer reader is properly closed before opening the next during utility operations.

Operators should verify whether any of their workflows or dependencies still rely on UBI 7, as its end-of-life status makes it unsuitable for production use. Transitioning away from deprecated or unsupported base images is a common pattern across projects to maintain security and compliance. Before upgrading, ensure that your CI/CD pipelines and testing environments are compatible with the updated fixtures and that no unintended dependencies on UBI 7 remain.