PMDK Version 2.1.2

• Set up a new home for pmdk software (pmem/pmdk -> daos-stack/pmdk).
  • Reorganized PMem HW tests to accommodate changes in HW supplies (#9-12).
• Expanded the sds.at_create CTL to also cover pmemobj_open() (#5, DAOS-17449)
  • Previously, this CTL affected only pmemobj_create().
  • Now, it affects both pmemobj_create() and pmemobj_open().
  • pmemobj_open() won't be able to open a pool with SDS enabled if the feature is currently
    force-disabled.
  • Conversely, pmemobj_open() does not issue a warning when attempting to open a pool with SDS disabled
    while the feature is force-disabled.