Usernetes

Notable changes:
- Moved the image from Docker Hub to GHCR: [`ghcr.io/rootless-containers/usernetes`](https://ghcr.io/rootless-containers/usernetes)

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:warning: The `rootlesscontainers/usernetes` image on Docker Hub will no longer be updated, due to the latest policy change of Docker Hub: https://www.docker.com/blog/changes-to-docker-hub-autobuilds/

Build logs (available for 90 days): https://github.com/rootless-containers/usernetes/runs/2903580251

Notable changes:
- Updated the patch set to follow the latest KEP discussion (introduced `KubeletInUserNamespace` feature gate): 228 229
- Improve 'hostname' compatibility : 224, thanks to Silvanoc

Build logs (available for 90 days): https://github.com/rootless-containers/usernetes/runs/2715722221

Notable changes:
- Unfork CRI-O (218)

Build logs (available for 90 days): https://github.com/rootless-containers/usernetes/runs/2516659373

Notable changes:
- Reduced the amount of kube-proxy patches (213 )

Build logs (available for 90 days): https://github.com/rootless-containers/usernetes/runs/2020536059

Notable changes:
- crio: support resource limitation with cgroup2 (210)

Build log (available for 90 days): https://github.com/rootless-containers/usernetes/runs/1806318510

Notable changes (200, 203):
- This release added support for systemd-delegated "cgroupfs" driver (v2 only). A pod is executed in a cgroup like `/user.slice/user-1001.slice/user1001.service/u7s-rootlesskit.service/kubepods/burstable/podb2d6a0c9-95d3-4372-80e0-bce249a26f95/7bb48caa579ee164fee4e0c072aaf430c2ec7b5dc13d512a5f19ce037de010ab` on cgroup v2 hosts.
- The installation script (`install.sh`) no longer needs `--cgroup-manager` flag.
- cgroupsPerQos is now supported.
- The patch for supporting "systemd" driver was removed.
- RootlessKit now unshares PIDNS, IPCNS, and UTSNS as well as UserNS, MountNS, and NetNS. All namespaces except TimeNS are now unshared.

Note: still no cgroup support for CRI-O yet

Build log: https://github.com/rootless-containers/usernetes/runs/1413643596