Trying to build for NRF52832 SDK11

If you want we can set it up like we do for the other SDKs (apart from 12) so we have a zip on EspruinBuildTools that the provision script pulls in?

In current state the file works as is so I could possibly make it into a zip an make a PR.

However there is no bootloader source to easily integrate and compile so only DFU zips would be buildable. However I just tried and the adafruit-nrfutilpip package conflicts with nrfutil. When installed it basically overwrites newer nrfutil with older nordic libraries so both commands run old legacy version, how to solve that? Sometime ago I solved it by installing nrfutil in python2 and adafruit-nrfutil in python3 but nowadays python2 is really old so not sure how provision script could properly install both without any breakage.