[SYS] Remove Multi Gateway Sync from idf example env

To avoid consuming procBLEtask stack memory when using esp idf framework

environments.ini

@@ -1904,5 +1904,6 @@ build_flags =
   '-DLED_PIN_ON=0'
   '-DGateway_Name="OMG_ESP32_BLE"'
   '-DUSE_BLUFI=1'
+  '-DenableMultiGTWSync=false'
   '-DARDUINO_LOOP_STACK_SIZE=17500'
 custom_description = Regular BLE gateway based on esp-idf with adaptive scanning activated, automatically adapts the scan parameters depending on your devices