[Bug][k8s-operator] Remove CONF_DIR from FlinkConfiguration (#4419)

Author: 7hong

dinky-gateway/src/main/java/org/dinky/gateway/kubernetes/operator/KubernetesOperatorGateway.java

@@ -38,6 +38,7 @@
 import org.apache.commons.collections.MapUtils;
 import org.apache.commons.lang3.StringUtils;
 import org.apache.flink.configuration.CoreOptions;
+import org.apache.flink.configuration.DeploymentOptionsInternal;
 import org.apache.flink.configuration.HighAvailabilityOptions;
 import org.apache.flink.configuration.JobManagerOptions;
 import org.apache.flink.configuration.TaskManagerOptions;
@@ -207,8 +208,8 @@ private void initResource() {
     }
 
     // flink config defined key
-    private final List<String> flinkConfigDefinedByFlink =
-            Lists.newArrayList("kubernetes.namespace", "kubernetes.cluster-id");
+    private final List<String> flinkConfigDefinedByFlink = Lists.newArrayList(
+            "kubernetes.namespace", "kubernetes.cluster-id", DeploymentOptionsInternal.CONF_DIR.key());
 
     private void initSpec() {
         String flinkVersion = flinkConfig.getFlinkVersion();