Local mode migration for webhook endpoints (#16094)

* Migrate update/list/show webhook endpoints to local mode

* Fix shadow errors

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

api4/webhook_local.go

@@ -0,0 +1,16 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package api4
+
+func (api *API) InitWebhookLocal() {
+	api.BaseRoutes.IncomingHooks.Handle("", api.ApiLocal(getIncomingHooks)).Methods("GET")
+	api.BaseRoutes.IncomingHook.Handle("", api.ApiLocal(getIncomingHook)).Methods("GET")
+	api.BaseRoutes.IncomingHook.Handle("", api.ApiLocal(updateIncomingHook)).Methods("PUT")
+	api.BaseRoutes.IncomingHook.Handle("", api.ApiLocal(deleteIncomingHook)).Methods("DELETE")
+
+	api.BaseRoutes.OutgoingHooks.Handle("", api.ApiLocal(getOutgoingHooks)).Methods("GET")
+	api.BaseRoutes.OutgoingHook.Handle("", api.ApiLocal(getOutgoingHook)).Methods("GET")
+	api.BaseRoutes.OutgoingHook.Handle("", api.ApiLocal(updateOutgoingHook)).Methods("PUT")
+	api.BaseRoutes.OutgoingHook.Handle("", api.ApiLocal(deleteOutgoingHook)).Methods("DELETE")
+}