[MM-56400] Allow mmctl to download a Support Packet using --local mode (#25836)

server/channels/api4/system_local.go

@@ -17,6 +17,7 @@ func (api *API) InitSystemLocal() {
 	api.BaseRoutes.APIRoot.Handle("/server_busy", api.APILocal(setServerBusy)).Methods("POST")
 	api.BaseRoutes.APIRoot.Handle("/server_busy", api.APILocal(getServerBusyExpires)).Methods("GET")
 	api.BaseRoutes.APIRoot.Handle("/server_busy", api.APILocal(clearServerBusy)).Methods("DELETE")
+	api.BaseRoutes.System.Handle("/support_packet", api.APILocal(generateSupportPacket)).Methods("GET")
 	api.BaseRoutes.APIRoot.Handle("/integrity", api.APILocal(localCheckIntegrity)).Methods("POST")
 	api.BaseRoutes.System.Handle("/schema/version", api.APILocal(getAppliedSchemaMigrations)).Methods("GET")
 }