move key

sql/src/main/java/org/apache/druid/sql/hook/DruidHook.java

@@ -35,6 +35,7 @@ public interface DruidHook<T>
   HookKey<RelNode> LOGICAL_PLAN = new HookKey<>("logicalPlan", RelNode.class);
   HookKey<RelNode> DRUID_PLAN = new HookKey<>("druidPlan", RelNode.class);
   HookKey<String> SQL = new HookKey<>("sql", String.class);
+  HookKey<String> MSQ_PLAN = new HookKey<>("msqPlan", String.class);
 
   @Immutable
   class HookKey<T>
@@ -71,6 +72,5 @@ public interface DruidHook<T>
     }
   }
 
-  HookKey<String> MSQ_PLAN = new HookKey<>("msqPlan", String.class);
   void invoke(HookKey<T> key, T object);
 }