API handler opts modifier (#26148)

* POC for API handler opts modifier

* Made upload POSt api a  file upload API

* Specified file upload local API

* Specified file upload local API

* Specified file upload API

* Simplified handler params

* Added basic security checks

* Fixed i18n

* used type for API handler options

* Removed limited reader from util deserializers (#26263)

server/channels/api4/file.go

@@ -32,7 +32,7 @@ const (
 const maxMultipartFormDataBytes = 10 * 1024 // 10Kb
 
 func (api *API) InitFile() {
-	api.BaseRoutes.Files.Handle("", api.APISessionRequired(uploadFileStream)).Methods("POST")
+	api.BaseRoutes.Files.Handle("", api.APISessionRequired(uploadFileStream, handlerParamFileAPI)).Methods("POST")
 	api.BaseRoutes.File.Handle("", api.APISessionRequiredTrustRequester(getFile)).Methods("GET")
 	api.BaseRoutes.File.Handle("/thumbnail", api.APISessionRequiredTrustRequester(getFileThumbnail)).Methods("GET")
 	api.BaseRoutes.File.Handle("/link", api.APISessionRequired(getFileLink)).Methods("GET")