Make use of use_1200bps_touch for external programmer

[MCUdude]

Feature request

See MegaCoreX issue #29 for more details.
It would be very useful if use_1200bps_touch was able to be added to external programmers as well. As discussed in the issue linked to above the Nano Every (for instance) could act as a native programmer. Today, that's simply not possible.

[thekunalsaini]

@MCUdude what exactly you want to do

[sevkin]

FYI reset.py from https://github.com/nicholaskell/Arduino_Loader