Clear planningWorkerNodes when model auto-deploys again after undeploy (opensearch-project#2396) (opensearch-project#2397)

Signed-off-by: Xun Zhang <xunzh@amazon.com>
(cherry picked from commit 8cb6a9b)

Co-authored-by: Xun Zhang <xunzh@amazon.com>

Author: opensearch-trigger-bot[bot]

plugin/src/main/java/org/opensearch/ml/task/MLPredictTaskRunner.java

@@ -167,6 +167,10 @@ public void dispatchTask(
                                 return;
                             }
                             String[] planningWorkerNodes = model.getPlanningWorkerNodes();
+                            boolean deployToAllNodes = model.isDeployToAllNodes();
+                            if (deployToAllNodes) {
+                                planningWorkerNodes = null;
+                            }
                             MLModel modelBeingAutoDeployed = mlModelManager.addModelToAutoDeployCache(modelId, model);
                             if (modelBeingAutoDeployed == model) {
                                 log.info(getErrorMessage("Automatically deploy model", modelId, isHidden));