- armbian-next: fixes to ORAS-related logging
- armbian-next: actually enable ORAS-based kernel git bare tree seeding/bundles; enable cleaning of bundle articfacts after confirmed working
- armbian-next: introduce ORAS-based kernel git bare tree seeding/bundles (although it is a .tar, not a bundle); this is 20x faster than cloning
- armbian-next: introduce `ORAS` tooling; pull and push functions & downloader/launcher
- now we've a single `.git` for all kernels with all branches; a "master" cache
- back to full stable git bundle usage from kernel.org
- bye bye, "gitballs"
- split kernel-related git stuff into `kernel-git.sh`
- introduce `ARMBIAN_MOUNTPOINTS_DEPRECATED` @TODO actually use for cleaning non-Docker
- add `axel` hostdep for multi-conn download of bundle, which comes from a CDN.
- deprecate old mountpoints for gitballs and linux-kernel
- move cleaning of old sources/kernel to mountpoints code
