fix: also reset hasMoved on moveMountedShardToEcNode error

Same issue as the previous fix: if moveMountedShardToEcNode fails
after some shards succeeded, hasMoved would incorrectly be true.
Ensure partial moves are always reported as failures.

weed/shell/command_volume_server_evacuate.go

@@ -225,6 +225,7 @@ func (c *commandVolumeServerEvacuate) moveAwayOneEcVolume(commandEnv *CommandEnv
 			}
 			err = moveMountedShardToEcNode(commandEnv, thisNode, ecShardInfo.Collection, vid, shardId, emptyNode, destDiskId, applyChange)
 			if err != nil {
+				hasMoved = false
 				return
 			} else {
 				hasMoved = true