chore: update UBI to 9.8 (release-1.8)

[Zaperex]

Description

Update release-1.8 dockerfile to use 9.8 UBI

Which issue(s) does this PR fix

• Fixes #

PR acceptance criteria

Please make sure that the following steps are complete:

• GitHub Actions are completed and successful
• Tests are updated and passing
• Documentation is updated

How to test changes / Special notes to the reviewer

[github-actions]

Container Image Published

Multi-platform container images are now available.

Tag	Image	Platforms
pr-102	quay.io/rhdh-community/dynamic-plugins-factory:pr-102	linux/amd64, linux/arm64
pr-102-cb60e66	quay.io/rhdh-community/dynamic-plugins-factory:pr-102-cb60e66	linux/amd64, linux/arm64

Expires: July 8, 2026

Pull Commands

# Multi-platform (auto-selects correct architecture)
podman pull quay.io/rhdh-community/dynamic-plugins-factory:pr-102

# Or with specific commit SHA
podman pull quay.io/rhdh-community/dynamic-plugins-factory:pr-102-cb60e66

Traceability

• Build: PR Build #28129834604
• Publish: PR Publish #28129985035
• Commit: cb60e66

[github-actions]

❌ E2E Tests Failed

End-to-end integration tests failed for the container image. See the workflow run for details.

Image: quay.io/rhdh-community/dynamic-plugins-factory:pr-102

No detailed results available.

Traceability

• Publish: PR Publish #28129985035
• E2E: E2E Tests #28130056886