Review modelling of V2 special pins

[microbit-matt-hillsdon]

pin_logo: MicroBitTouchPin
"""A touch sensitive logo pin on the front of the micro:bit, which by default is set to capacitive touch mode."""

pin_speaker: MicroBitAnalogDigitalPin
"""A pin to address the micro:bit speaker.

The API is much reduced for these pins and the current types will suggest they have methods that the pins do not support.

See https://microbit-micropython.readthedocs.io/en/v2-docs/microbit_micropython_api.html#:~:text=the%20following%20API%3A-,pin_logo%3A,-%23%20returns%20boolean%20for