[BT] MQTT corruption fix (#2183)

Storing a copy of the ID instead of a pointer to a local variable to avoid MQTT publishing id topic and id property corruption.

environments.ini

@@ -188,7 +188,7 @@ custom_hardware = Theengs Plug
 platform = ${com.esp32_platform}
 board = esp32dev
 extra_scripts = ${com-esp32.extra_scripts}
-board_build.partitions = partitions/no_coredump.csv
+board_build.partitions = partitions/alltest_large.csv
 lib_deps =
   ${com-esp32.lib_deps}
   ${libraries.ble}