Changing error to DEADLINE_EXCEEDED

Author: darshan-sj

v2/failure-injected-spanner-service/src/main/java/com/google/cloud/teleport/v2/spanner/service/SpannerService.java

@@ -91,7 +91,7 @@ public void onMessage(RespT message) {
                 public void onClose(Status status, Metadata metadata) {
                   if (errorInjected.get()) {
                     // Return an error as if it has been sent from Spanner.
-                    status = Status.PERMISSION_DENIED.augmentDescription("INJECTED BY TEST");
+                    status = Status.DEADLINE_EXCEEDED.augmentDescription("INJECTED BY TEST");
                   }
                   super.onClose(status, metadata);
                 }

v2/failure-injection-policies/src/test/java/com/google/cloud/teleport/v2/failureinjection/NoOpPolicyTest.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright (C) 2025 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
 package com.google.cloud.teleport.v2.failureinjection;
 
 import static org.junit.Assert.assertFalse;