test: Add 1.12.2, remove 1.4.2

Author: NickLarsenNZ

tests/test-definition.yaml

@@ -4,8 +4,8 @@ dimensions:
     values:
       # To use a custom image, add a comma and the full name after the product version
       # 0.67.1,oci.stackable.tech/sdp/opa:0.67.1-stackable0.0.0-dev
-      - 1.4.2
       - 1.8.0
+      - 1.12.2
   - name: opa-latest
     values:
       # To use a custom image, add a comma and the full name after the product version