[HUDI-1072] Introduce REPLACE top level action. Implement insert_overwrite operation on top of replace action (#2048)

hudi-common/src/main/avro/HoodieRollbackMetadata.avsc

@@ -39,6 +39,16 @@
         "name":"version",
         "type":["int", "null"],
         "default": 1
+     },
+     /* overlaps with 'commitsRollback' field. Adding this to track action type for all the instants being rolled back. */
+     {
+       "name": "instantsRollback",
+       "default": null,
+       "type": {
+          "type": "array",
+          "default": null,
+          "items": "HoodieInstantInfo"
+       }
      }
  ]
 }