[feature] Free a little memory used by bluetooth if wifi is enabled or bluetooth is disabled (#10398)

* esp32: release BTDM heap when Bluetooth inactive

Release ESP-IDF BTDM memory after config load when Bluetooth is disabled or WiFi is enabled, recovering heap on ESP32 targets where BLE won’t be used for this boot.

* Address BT memory release review comments

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Co-authored-by: Ben Meadors <benmmeadors@gmail.com>

src/modules/AdminModule.cpp

@@ -1753,6 +1753,7 @@ void disableBluetooth()
 #ifdef ARCH_ESP32
     if (nimbleBluetooth)
         nimbleBluetooth->deinit();
+    esp32ReleaseBluetoothMemoryIfUnused();
 #elif defined(ARCH_NRF52)
     if (nrf52Bluetooth)
         nrf52Bluetooth->shutdown();