ctdb-protocol: Add missing push support for new controls

ctdb-protocol: Add missing push support for new controls

CTDB_CONTROL_TCP_CLIENT_DISCONNECTED and
CTDB_CONTROL_TCP_CLIENT_PASSED were added in commits
c6602b686b4e50d93272667ef86d3904181fb1ab and
037e8e449deb136ad5ed5e4de05439411b545b6d.  They were missing test
support for the packet push/pull.  While adding the testing (for
completeness, before adding another new control) I noticed that the
push functionality was absent.  This adds that, along with the test
support.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15580

Signed-off-by: Martin Schwenke <mschwenke@ddn.com>
Reviewed-by: Volker Lendecke <vl@samba.org>
Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Mon Feb 19 10:21:48 UTC 2024 on atb-devel-224

(cherry picked from commit dd9b11acbc4fbde1941719968aeb463b853b0ffb)

Autobuild-User(v4-20-test): Jule Anger <janger@samba.org>
Autobuild-Date(v4-20-test): Tue Feb 20 13:46:47 UTC 2024 on atb-devel-224