Switch Docker images to UBI

[pkoutsovasilis]

Proposed commit message

This PR follows the plan for 9.0 release and replaces the default Ubuntu-based Docker images for all beats with UBI-minimal-based images. It updates the packaging files, Docker templates, and configuration to ensure compatibility with UBI-minimal images. The changes involve:

• Removal of Ubuntu-specific configurations and dependencies.
• Addition of UBI-minimal-specific configurations to maintain functionality.

Checklist

• My code follows the style guidelines of this project
• I have added an entry in CHANGELOG.next.asciidoc or CHANGELOG-developer.next.asciidoc.

Disruptive User Impact

The changes should not cause any disruption for most users, as functionality is preserved. However, users relying on Ubuntu-specific dependencies in custom configurations or extensions may need to adjust their setups to ensure compatibility with UBI-minimal.

Author's Checklist

N/A

How to test this PR locally

Run the integration test of beats

Related issues

N/A

Use cases

N/A

Screenshots

N/A

Logs

N/A

[mergify]

This pull request does not have a backport label.
If this is a bug or security fix, could you label this PR @pkoutsovasilis? 🙏.
For such, you'll need to label your PR with:

• The upcoming major version of the Elastic Stack
• The upcoming minor version of the Elastic Stack (if you're not pushing a breaking change)

To fixup this pull request, you need to add the backport labels for the needed
branches, such as:

• backport-8./d is the label to automatically backport to the 8./d branch. /d is the digit

[mergify]

backport-8.x has been added to help with the transition to the new branch 8.x.
If you don't need it please use backport-skip label and remove the backport-8.x label.

[elasticmachine]

Pinging @elastic/elastic-agent-control-plane (Team:Elastic-Agent-Control-Plane)