xfsprogs: update to 6.19.0

xfsprogs: update to 6.19.0

Update from 6.10.1 to 6.19.0. Notable changes:

- 6.19.0: fix log sunit automatic configuration in mkfs; fix data
  corruption bug in libxfs_file_write; fix various memory leaks; improve
  realtime subvolume info in xfs_io statfs
- 6.18.0: adjust nr_zones for zoned filesystems on conventional devices
  in mkfs; fix xfs_logprint pointer bugs; fix mdrestore superblock length
  check; add 2025 LTS config
- 6.16.0: atomic write enhancements for maximum atomic write limits at
  mount time; refactor log recovery infrastructure; remove experimental
  warnings from xfs_scrub
- 6.13.0: comprehensive metadata directory support in xfs_repair, xfs_db,
  and mkfs; realtime group support with new RT group structures; quota
  inodes use metadata directory infrastructure; realtime space quotas
- 6.12.0: realtime device support in xfs_db; file range commit ioctls
  with atomic write statx fields; modernize perag lookup to xarray;
  require -std=gnu11 for compilation

Add test.sh to verify xfs-mkfs and xfs-fsck report the correct version
and xfs-admin/xfs-growfs produce expected help output.

Signed-off-by: Alexandru Ardelean <redacted>