Add GHA workflow

[rcooke-warwick]

Changelog-entry: Add GHA workflow

[klutchell]

Interesting error:

All files processed with version 0.9.3
[000000007][LOG]Reverted to the old bitbake syntax in meta-balena-rust layer.
[000000007][LOG]BalenaOS build initialized in directory: build.
[000000007][LOG]Run build for up-board: MACHINE=up-board bitbake balena-image-flasher 
[000000007][LOG]This might take a while ...
Traceback (most recent call last):
  File "/work/layers/poky/bitbake/bin/bitbake", line 19, in <module>
    import bb
  File "/work/layers/poky/bitbake/lib/bb/__init__.py", line 75, in <module>
    import bb.msg
  File "/work/layers/poky/bitbake/lib/bb/msg.py", line 19, in <module>
    import bb.event
  File "/work/layers/poky/bitbake/lib/bb/event.py", line 22, in <module>
    import bb.compat
  File "/work/layers/poky/bitbake/lib/bb/compat.py", line 7, in <module>
    from collections import MutableMapping, KeysView, ValuesView, ItemsView, OrderedDict
ImportError: cannot import name 'MutableMapping' from 'collections' (/usr/lib/python3.10/collections/__init__.py)

[klutchell]

We need to update the required checks for this repo.

[rcooke-warwick]

Yes, this wasn't building before even in jenkins, we took it away from the old yocto-all. This #556 was the work being done to repair things I think , pre switch to GHA