Convert more modules to use MP_REGISTER_MODULE

[capellini]

Convert bitbangio, bitmaptools, _bleio, board, busio, countio, digitalio, framebufferio, frequencyio, gamepadshift, getpass, keypad, math, microcontroller, and msgpack modules to use MP_REGISTER_MODULE.

Related to #5183.

[capellini]

I also removed the duplicate code per #5183 (comment) and added the __name__ attribute to the bitmaptools module, per #5183 (comment).

I can also add the __name__ attribute to each of the ports for the board module, but that may take some time (unless there's a better way to add the __name__ attribute to the module).

[jepler]

Thanks! Didn't test, but looks good.

[jepler]

I've split the board.__name__ off into its own issue so we can consider it separately.