test: Remove ZooKeeper 2.9.2

Author: NickLarsenNZ

tests/test-definition.yaml

@@ -2,7 +2,6 @@
 dimensions:
   - name: zookeeper
     values:
-      - 3.9.2
       - 3.9.3
       # To use a custom image, add a comma and the full name after the product version
       # - 3.9.3,oci.stackable.tech/sdp/zookeeper:3.9.3-stackable0.0.0-dev