Bug 32250: (follow-up) Remove use of AutoCommit=0

Bug 32250: (follow-up) Remove use of AutoCommit=0

This patch moves to using txn_begin and txn_commit

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Bug 32250: (follow-up) Remove one more dbh commit and don't start a new transaction when done

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit a3a58b93c3d1c78153dec8a3e5849561f7cf6607)
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>