storage: Expect empty param in REST requests (#8167)

Empty parameter was forgotten to be added to restQueries() function,
scanning with deep parameter wasn't working properly for distributed
setup.

cmd/storage-rest-server.go

@@ -600,7 +600,7 @@ func registerStorageRESTHandlers(router *mux.Router, endpoints EndpointList) {
 		subrouter.Methods(http.MethodPost).Path(SlashSeparator + storageRESTMethodRenameFile).HandlerFunc(httpTraceHdrs(server.RenameFileHandler)).
 			Queries(restQueries(storageRESTSrcVolume, storageRESTSrcPath, storageRESTDstVolume, storageRESTDstPath)...)
 		subrouter.Methods(http.MethodPost).Path(SlashSeparator + storageRESTMethodVerifyFile).HandlerFunc(httpTraceHdrs(server.VerifyFile)).
-			Queries(restQueries(storageRESTVolume, storageRESTFilePath, storageRESTBitrotAlgo, storageRESTLength)...)
+			Queries(restQueries(storageRESTVolume, storageRESTFilePath, storageRESTBitrotAlgo, storageRESTLength, storageRESTEmpty)...)
 		subrouter.Methods(http.MethodPost).Path(SlashSeparator + storageRESTMethodGetInstanceID).HandlerFunc(httpTraceAll(server.GetInstanceID))
 	}