[Bug]: Backup fail because hasCollection response has no status

[wayblink]

Is there an existing issue for this?

• I have searched the existing issues

Environment

- Milvus version:
- Deployment mode(standalone or cluster):
- MQ type(rocksmq, pulsar or kafka):    
- SDK version(e.g. pymilvus v2.0.0rc2):
- OS(Ubuntu or CentOS): 
- CPU/Memory: 
- GPU: 
- Others:

Current Behavior

zilliztech/milvus-backup#448

milvus-go-sdk has a handleRespStatus logic for every response, status must not be empty

func handleRespStatus(status *commonpb.Status) error {
	if status == nil {
		return ErrStatusNil
	}
	if status.ErrorCode != commonpb.ErrorCode_Success {
		if status.GetReason() != "" {
			return ErrServiceFailed(errors.New(status.GetReason()))
		}
		return ErrServiceFailed(errors.New("Service failed"))
	}
	return nil
}

Expected Behavior

No response

Steps To Reproduce

No response

Milvus Log

No response

Anything else?

No response

[yanliang567]

/assign @wayblink
/unassign