Fix linker failure when using BluetoothSerial on latest release with Arduino as Component.

[blackhack]

Description of Change

Similar to #8768

Fixes this linker error:

c:/users/david/.platformio/packages/toolchain-xtensa-esp32/bin/../lib/gcc/xtensa-esp32-elf/12.2.0/../../../../xtensa-esp32-elf/bin/ld.exe: .pio\build\esp32dev\lib90a\libBluetoothSerial.a(BluetoothSerial.cpp.o):(.literal._ZN21BTAdvertisedDeviceSetC1ERKS_[_ZN21BTAdvertisedDeviceSetC1ERKS_]+0x0): undefined reference to `vtable for BTAdvertisedDevice'
c:/users/david/.platformio/packages/toolchain-xtensa-esp32/bin/../lib/gcc/xtensa-esp32-elf/12.2.0/../../../../xtensa-esp32-elf/bin/ld.exe: .pio\build\esp32dev\lib90a\libBluetoothSerial.a(BluetoothSerial.cpp.o):(.literal._Z41__static_initialization_and_destruction_0ii+0xc): undefined reference to `vtable for BTScanResults'

Tests scenarios

Can be tested with the example "SerialToSerialBT," but when using Arduino as a component, I suppose it's because of what Jason2866 commented about "CONFIG_COMPILER_OPTIMIZATION_SIZE" here.

[me-no-dev]

Thanks @blackhack !