LU-16314 llite: Prefer %pK with seq_printf

LU-16314 llite: Prefer %pK with seq_printf

Update procfs and sysfs users to prefer %pK to when
printing pointers so that when kptr_restrict is set to 1
a real pointer value is provided.

To enable printing non-hashed pointer values:
  sysctl -w kernel/kptr_restrict=1

This change also sets kptr_restrict to 1 for all clients
and servers under test by test framework.

Test-Parameters: trivial
HPE-bug-id: LUS-10945
Signed-off-by: Shaun Tancheff <shaun.tancheff@hpe.com>
Change-Id: Iccfce1399648e752cb7b78afc75aacbfb0bde390
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/51212
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Patrick Farrell <pfarrell@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Oleg Drokin <green@whamcloud.com>