Move away from bitnami docker images

[xrmx]

We are using bitnami docker images for kafka and zookeeper that will go away September 29th per https://community.broadcom.com/tanzu/blogs/beltran-rueda-borrego/2025/08/18/how-to-prepare-for-the-bitnami-changes-coming-soon?CommunityKey=56a49fa1-c592-460c-aa05-019446f8102f.