vfs_gpfs: add gpfs:clamp_invalid_times

vfs_gpfs: add gpfs:clamp_invalid_times

The timestamp validation added as part of the fix for bug 15151 causes hard
failures for certain clients that seem to use a temporary timestamp initially
when creating files, changing in a later step.

Clamp invalid timestamps to the allowed range 0..UINT32_MAX if
"gpfs:clamp_invalid_times = yes" is set.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15151

Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Christof Schmitt <cs@samba.org>
Autobuild-User(master): Christof Schmitt <cs@samba.org>
Autobuild-Date(master): Wed Feb  5 23:42:15 UTC 2025 on atb-devel-224