feat: bump CrossGCC & openOCD versions to enable Apple Silicon support

[ahiuchingau]

Changelog:

• Use the xPack to install GCC (we already use it for openOCD so we might as well)
• Bump GCC version to 11.3.1-1.1 and add Apple Silicon MacOS support
• Bump openOCD version to 0.12.0-1 and add Apple Silicon support

Any concerns with the version choices?

[fsinapi]

I looked into doing a version bump a while ago, and it presents some issues with opentrons-modules; we're using a motor-controlled library for the BLDC motor and it uses some undefined behavior that won't compile in GCC11, so we'd really need a way to support both GCC10 and GCC11 before this could get pulled into the modules repo.

That aside, I'm pretty sure this version of gcc drops support for the arm-none-eabi-gdb-py debugging executable we were using, replacing it with arm-none-eabi-gdb-py3, so we'd need to rewrite the debugging tooling. I remember there being some small incompatibility with the new executable and some other parts of our debugging toolchain but I don't remember specifics off the top of my head.

[sfoster1]

Okay, sure. IMO we should use whatever the most up to date quarterly release it is. We should also make sure to give a system a flash of a dev build, to test

• bootloader on old compiler boots app on new compiler
• bootloader on new compiler boots app on new compiler (aka full-flash)
• bootloader on new compiler accepts update of new app
  And some basic functionality tests.

I've been burned by updating compilers in the past (mostly exposing bad things I did) so I'm nervous but that's a bad excuse to not to do it, so let's.