[MM-37772] Idiomatic naming (URL, URI, API) (#18128)

* s/Url/URL/g & s/Uri/URI/g

* s/Api/API/g

api4/upload.go

@@ -16,9 +16,9 @@ import (
 )
 
 func (api *API) InitUpload() {
-	api.BaseRoutes.Uploads.Handle("", api.ApiSessionRequired(createUpload)).Methods("POST")
-	api.BaseRoutes.Upload.Handle("", api.ApiSessionRequired(getUpload)).Methods("GET")
-	api.BaseRoutes.Upload.Handle("", api.ApiSessionRequired(uploadData)).Methods("POST")
+	api.BaseRoutes.Uploads.Handle("", api.APISessionRequired(createUpload)).Methods("POST")
+	api.BaseRoutes.Upload.Handle("", api.APISessionRequired(getUpload)).Methods("GET")
+	api.BaseRoutes.Upload.Handle("", api.APISessionRequired(uploadData)).Methods("POST")
 }
 
 func createUpload(c *Context, w http.ResponseWriter, r *http.Request) {