- striped defconfigs with static libs to build working toolchains
- disable PARTED & GDB on static uClibc
- update actions with static toolchains output
No functional changes here, just a few housekeeping things:
1) Renamed it to "build.yml" and "Buildroot" since it's responsibilities have now expanded.
2) Got rid of all the caching stuff since we're not using it any more.
3) Updated the upload-artifact action to v3 to resolve the warnings Github was logging about v2 using a deprecated node.js version