cgroup: Changes for v6.11

- Added Michal Koutný as a maintainer.

- Counters in pids.events were behaving inconsistently. pids.events made
  properly hierarchical and pids.events.local added.

- misc.peak and misc.events.local added.

- cpuset remote partition creation and cpuset.cpus.exclusive handling
  improved.

- Code cleanups, non-critical fixes, doc updates.

- for-6.10-fixes is merged in to receive two non-critical fixes that didn't
  trigger pull.
Merge branch 'for-6.10-fixes' into for-6.11