python:gp: Fix logging with gp

python:gp: Fix logging with gp

This allows enable INFO level logging with: `samba-gpupdate -d3`

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15558

Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit 145194071b10c4c1857f28fe79c57fd63ffab889)

Autobuild-User(v4-19-test): Jule Anger <janger@samba.org>
Autobuild-Date(v4-19-test): Mon Feb  5 12:34:12 UTC 2024 on atb-devel-224