build: Include ksqldb-rocksdb-config-setter in docker image

[cefothe]

Description

Fixes #6838 the ksqldb-rocksdb-config-setter is now part of the docker image

Testing done

I have built a docker image and verified manually that the jar is there

Reviewer checklist

• Ensure docs are updated if necessary. (eg. if a user visible feature is being added or changed).
• Ensure relevant issues are linked (description should include text like "Fixes #")
• Do these changes have compatibility implications for rollback? If so, ensure that the ksql command version is bumped.

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