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

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

* s/Api/API/g

api4/integration_action.go

@@ -11,10 +11,10 @@ import (
 )
 
 func (api *API) InitAction() {
-	api.BaseRoutes.Post.Handle("/actions/{action_id:[A-Za-z0-9]+}", api.ApiSessionRequired(doPostAction)).Methods("POST")
+	api.BaseRoutes.Post.Handle("/actions/{action_id:[A-Za-z0-9]+}", api.APISessionRequired(doPostAction)).Methods("POST")
 
-	api.BaseRoutes.ApiRoot.Handle("/actions/dialogs/open", api.ApiHandler(openDialog)).Methods("POST")
-	api.BaseRoutes.ApiRoot.Handle("/actions/dialogs/submit", api.ApiSessionRequired(submitDialog)).Methods("POST")
+	api.BaseRoutes.APIRoot.Handle("/actions/dialogs/open", api.APIHandler(openDialog)).Methods("POST")
+	api.BaseRoutes.APIRoot.Handle("/actions/dialogs/submit", api.APISessionRequired(submitDialog)).Methods("POST")
 }
 
 func doPostAction(c *Context, w http.ResponseWriter, r *http.Request) {