It was noted that neutron uses the method `lrp_del_gateway_chassis`[0] but this function is not present on the python-ovsdbapp code  [1]. 

In order to fix this either we can add the patch to the ovsdbapp code, or it could be ported on the neutron repository.

[0] https://gitlab.cee.redhat.com/eng/openstack/neutron/-/blob/rhos-17.1-trunk-patches/neutron/plugins/ml2/drivers/ovn/mech_driver/ovsdb/maintenance.py?ref_type=heads#L1327
[1] https://gitlab.cee.redhat.com/eng/openstack/python-ovsdbapp/-/blob/rhos-17.1-patches/ovsdbapp/schema/ovn_northbound/impl_idl.py?ref_type=heads