Merge branch 'slab/for-6.2/slub-sysfs' into slab/for-next

- Two patches for SLUB's sysfs by Rasmus Villemoes to remove dead code
  and optimize boot time with late initialization.
- Allow SLUB's sysfs 'failslab' parameter to be runtime-controllable
  again as it can be both useful and safe, by Alexander Atanasov.