Add merge requested automation to gitops policy (#26630)

Author: weshaggard

.github/policies/resourceManagement.yml

@@ -2539,6 +2539,16 @@ configuration:
         then:
         - addLabel:
             label: TypeSpec
+    - if:
+      - payloadType: Issue_Comment
+      then:
+      - if:
+        - commentContains:
+            pattern: "$/pr RequestMerge^"
+            isRegex: true
+        then:
+        - addLabel:
+            label: MergeRequested
     - if:
       - payloadType: Pull_Request
       then: