xfs/019: fix golden output for files created in setgid dir

xfs/019: fix golden output for files created in setgid dir

A recent change to xfs/019 exposed a long-standing bug in mkfs where
it would always set the gid of a new child created in a setgid directory
to match the gid parent directory instead of what's in the protofile.

Ignoring the user's directions is not the correct behavior, so update
this test to reflect that.  Also don't erase the $seqres.full file,
because that makes forensic analysis pointlessly difficult.

Cc: Catherine Hoang <catherine.hoang@oracle.com>
Fixes: 7834a740 ("xfs/019: extend protofile test")
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Catherine Hoang <catherine.hoang@oracle.com>
Reviewed-by: Zorro Lang <zlang@redhat.com>
Signed-off-by: Zorro Lang <zlang@kernel.org>