[refactor](delete) refactor FE DeleteHandler related logic (apache#25497

)

fe/fe-core/src/main/java/org/apache/doris/catalog/Partition.java

@@ -282,6 +282,14 @@ public long getReplicaCount() {
         return replicaCount;
     }
 
+    public long getAllReplicaCount() {
+        long replicaCount = 0;
+        for (MaterializedIndex mIndex : getMaterializedIndices(IndexExtState.ALL)) {
+            replicaCount += mIndex.getReplicaCount();
+        }
+        return replicaCount;
+    }
+
     public boolean hasData() {
         // The fe unit test need to check the selected index id without any data.
         // So if set FeConstants.runningUnitTest, we can ensure that the number of partitions is not empty,

fe/fe-core/src/main/java/org/apache/doris/load/DeleteInfo.java

@@ -60,10 +60,6 @@ public class DeleteInfo implements Writable, GsonPostProcessable {
     @SerializedName(value = "partitionName")
     private String partitionName;
 
-    public DeleteInfo() {
-        this.deleteConditions = Lists.newArrayList();
-    }
-
     public DeleteInfo(long dbId, long tableId, String tableName, List<String> deleteConditions) {
         this.dbId = dbId;
         this.tableId = tableId;