Upgrade base image to ubi9-minimal in Dockerfile.fips

What does this MR do?

• Upgrade base image to minimal variant of UBI9 in Dockerfile.fips

Vulnerabilities remediated/introduced after the upgrade:

Critical: 0(ubi8) - 0(ubi9) = No change
High: 0(ubi8) - 3(ubi9) = +3 introduced
Medium: 64(ubi8) - 58(ubi9) = 6 remediated
Low: 40(ubi8) - 23(ubi9) = 17 remediated

What are the relevant issue numbers?

• Update FIPS-compliant UBI-based Static Analysis... (gitlab-org/gitlab#382691)

Does this MR meet the acceptance criteria?

• Changelog entry added
• Documentation created/updated for GitLab EE, if necessary
• Documentation created/updated for this project, if necessary
• Documentation reviewed by technical writer or follow-up review issue created
• Tests added for this feature/bug
• Job definition updated, if necessary
  • Auto-DevOps template
  • Job definition example
  • CI Templates
• Conforms to the code review guidelines
• Conforms to the Go guidelines
• Security reports checked/validated by reviewer