Ignore 404-Not Found exceptions when cleaning up resources after tests (

#73753) (#73760)

We're doing some clean up logic to delete indices, data streams, 
auto-follow patterns or searchable snapshot indices in some test 
classes after a test case is executed. Today we either fail or log 
a warning if the clean up failed but I think we should simply 
ignore the 404 - Not Found response exception, like we do in 
other places for regular indices.

Note that this change applies only:
- when cleaning up searchable snapshots indices in ESRestTestCase
- when cleaning up indices, data streams and auto-follow pattern in AutoFollowIT

test/framework/src/main/java/org/elasticsearch/test/rest/ESRestTestCase.java

@@ -820,8 +820,14 @@ protected void wipeSearchableSnapshotsIndices() throws IOException {
         Map<String, ?> indices = (Map<String, ?>) XContentMapValues.extractValue("metadata.indices", entityAsMap(response));
         if (indices != null) {
             for (String index : indices.keySet()) {
-                assertAcked("Failed to delete searchable snapshot index [" + index + ']',
-                    adminClient().performRequest(new Request("DELETE", index)));
+                try {
+                    assertAcked("Failed to delete searchable snapshot index [" + index + ']',
+                        adminClient().performRequest(new Request("DELETE", index)));
+                } catch (ResponseException e) {
+                    if (isNotFoundResponseException(e) == false) {
+                        throw e;
+                    }
+                }
             }
         }
     }
@@ -1764,4 +1770,12 @@ protected static void useIgnoreMultipleMatchingTemplatesWarningsHandler(Request
         });
         request.setOptions(options);
     }
+
+    protected static boolean isNotFoundResponseException(IOException ioe) {
+        if (ioe instanceof ResponseException) {
+            Response response = ((ResponseException) ioe).getResponse();
+            return response.getStatusLine().getStatusCode() == 404;
+        }
+        return false;
+    }
 }

x-pack/plugin/ccr/qa/multi-cluster/src/test/java/org/elasticsearch/xpack/ccr/AutoFollowIT.java

@@ -876,20 +876,29 @@ private void cleanUp(
             try {
                 deleteAutoFollowPattern(client, autoFollowPattern);
             } catch (IOException e) {
+                if (isNotFoundResponseException(e)) {
+                    continue;
+                }
                 logger.warn(() -> new ParameterizedMessage("failed to delete auto-follow pattern [{}] after test", autoFollowPattern), e);
             }
         }
         for (String dataStream : dataStreams) {
             try {
                 deleteDataStream(client, dataStream);
             } catch (IOException e) {
+                if (isNotFoundResponseException(e)) {
+                    continue;
+                }
                 logger.warn(() -> new ParameterizedMessage("failed to delete data stream [{}] after test", dataStream), e);
             }
         }
         for (String index : indices) {
             try {
                 deleteIndex(client, index);
             } catch (IOException e) {
+                if (isNotFoundResponseException(e)) {
+                    continue;
+                }
                 logger.warn(() -> new ParameterizedMessage("failed to delete index [{}] after test", index), e);
             }
         }