pin generator version to 4.3.1 for legacy modules' generate action

Signed-off-by: Min Jin <[email protected]>

Author: yue9944882

.github/workflows/generate.yml

@@ -59,7 +59,7 @@ jobs:
           export PACKAGE_NAME="io.kubernetes.client.openapi"
           EOF
 
-          bash java.sh ../../kubernetes/ settings
+          USE_SINGLE_PARAMETER=false OPENAPI_GENERATOR_COMMIT=v4.3.1 bash java.sh ../../kubernetes/ settings
           popd
           rm -rf gen
       - name: Generate Fluent