chore(ubi-rust-builders): Update container images ahead of Stackable Release 25.7.0

[NickLarsenNZ]

Part of #1064.

• Remove: ubi8-rust-builder

Tip

Please add the scheduled-for/20XX-XX label, and add to the Stackable Engineering project.

Update tasks

• Update UBI version hash in the Dockerfile (FROM)
• Update PROTOC_VERSION

Related Pull Requests

• chore(ubi-rust-builders): Update container images ahead of Stackable Release 25.7.0 #1091

Acceptance

Tip

This list should be completed by the assignee(s), once respective PRs have been merged. Once all items have been
checked, the issue can be moved into Development: Done.

• Remove ubi8-rust-builder
• Done for ubi9-rust-builder/Dockerfile
• Can build the image locally
• Can build an operator image

Testing instructions

docker build -t oci.stackable.tech/sdp/ubi9-rust-builder . -f ubi9-rust-builder/Dockerfile

# Change directory into the an operator repository and ensure the image can build
docker build . -f docker/Dockerfile

Please consider updating this template if these instructions are wrong, or
could be made clearer.