Update to Github Actions Infrastructure

[lowprivshighhopes]

Currently there is a space limit on the free tier 14GB /dev/sdb and 20GB /dev/sda ubuntu OS github runners. (This is causing builds to fail)
A few options and avenues to research to address the issue

1. Make smaller builds.
2. Use a self-hosted runner.
3. Slimming out the current runner, but I don't know how much we'll get out of that.

[ztroop]

@phunkpwnz found that the builds are a lot bigger than we initially thought.

Filesystem       Size  Used Avail Use% Mounted on
...
/dev/root        84G   65G   19G  78% /  # Before
/dev/root        84G   82G  1.4G  99% /  # After

[xFreed0m]

This restriction is new? I don't recall we faced it in the past.
Our current iso is around 2-3GB AFAIR