kvclient: let QueryLocks and LeaseInfo requests through txnWriteBuffer

These requests don't interact with buffered writes, so we simply allow
the requests and their response to go through the interceptor unchanged.

Release note: None

Author: yuzefovich

pkg/kv/kvclient/kvcoord/txn_interceptor_write_buffer.go

@@ -344,6 +344,7 @@ func (twb *txnWriteBuffer) validateRequests(ba *kvpb.BatchRequest) error {
 			if t.ScanFormat == kvpb.COL_BATCH_RESPONSE {
 				return unsupportedOptionError(t.Method(), "COL_BATCH_RESPONSE scan format")
 			}
+		case *kvpb.QueryLocksRequest, *kvpb.LeaseInfoRequest:
 		default:
 			// All other requests are unsupported. Note that we assume EndTxn and
 			// DeleteRange requests were handled explicitly before this method was
@@ -816,6 +817,11 @@ func (twb *txnWriteBuffer) applyTransformations(
 			// the request to the KV layer.
 			baRemote.Requests = append(baRemote.Requests, ru)
 
+		case *kvpb.QueryLocksRequest, *kvpb.LeaseInfoRequest:
+			// These requests don't interact with buffered writes, so we simply
+			// let them through.
+			baRemote.Requests = append(baRemote.Requests, ru)
+
 		default:
 			return nil, nil, kvpb.NewError(unsupportedMethodError(t.Method()))
 		}
@@ -1183,6 +1189,10 @@ func (t transformation) toResp(
 		}
 		ru.MustSetInner(reverseScanResp)
 
+	case *kvpb.QueryLocksRequest, *kvpb.LeaseInfoRequest:
+		// These requests don't interact with buffered writes, so we simply
+		// let the response through unchanged.
+
 	default:
 		return ru, kvpb.NewError(unsupportedMethodError(req.Method()))
 	}