Extend ActionRequest and TransportService for Resource permissions

Signed-off-by: Stephen Crawford <steecraw@amazon.com>

server/src/main/java/org/opensearch/action/ActionRequest.java

@@ -38,6 +38,8 @@
 import org.opensearch.transport.TransportRequest;
 
 import java.io.IOException;
+import java.util.Collections;
+import java.util.List;
 
 /**
  * Base action request implemented by plugins.
@@ -58,6 +60,14 @@ public ActionRequest(StreamInput in) throws IOException {
         super(in);
     }
 
+    /**
+     * Should be overwritten by implementing plugins with the resources each actionRequest requires.
+     * Bypasses resource evaluation by default.
+     */
+    public List<String> getResources() {
+        return Collections.emptyList();
+    }
+
     public abstract ActionRequestValidationException validate();
 
     /**

server/src/main/java/org/opensearch/transport/TransportService.java

@@ -1106,7 +1106,8 @@ public TransportAddress[] addressesFromString(String address) throws UnknownHost
                 "cluster:monitor",
                 "cluster:internal",
                 "internal:",
-                "views:"
+                "views:",
+                "resource:"
             )
         )
     );