ovs-master jobs failing with lib/actions.c:4549:9: error: struct ofpact_sample has no member named obs_domain_imm; did you mean obs_domain_id?

[yatin]

Broken since https://github.com/ovn-org/ovn/commit/4ed71c20f53fb7ed58e8a0f993125a70a19619f4

Fails as below:-
2024-07-30 02:40:39.534572 | controller | mv -f $depbase.Tpo $depbase.Plo
2024-07-30 02:40:39.600783 | controller | lib/actions.c: In function ‘encode_SAMPLE’:
2024-07-30 02:40:39.601802 | controller | lib/actions.c:4549:9: error: ‘struct ofpact_sample’ has no member named ‘obs_domain_imm’; did you mean ‘obs_domain_id’?
2024-07-30 02:40:39.601837 | controller | 4549 | os->obs_domain_imm =
2024-07-30 02:40:39.601860 | controller | | ^~~~~~~~~~~~~~
2024-07-30 02:40:39.601881 | controller | | obs_domain_id
2024-07-30 02:40:39.603037 | controller | lib/actions.c:4553:13: error: ‘struct ofpact_sample’ has no member named ‘obs_point_imm’; did you mean ‘obs_point_id’?
2024-07-30 02:40:39.603071 | controller | 4553 | os->obs_point_imm = ep->lflow_uuid.parts[0];
2024-07-30 02:40:39.603093 | controller | | ^~~~~~~~~~~~~
2024-07-30 02:40:39.603113 | controller | | obs_point_id
2024-07-30 02:40:39.604224 | controller | lib/actions.c:4555:13: error: ‘struct ofpact_sample’ has no member named ‘obs_point_imm’; did you mean ‘obs_point_id’?
2024-07-30 02:40:39.604287 | controller | 4555 | os->obs_point_imm = sample->obs_point_id;
2024-07-30 02:40:39.604340 | controller | | ^~~~~~~~~~~~~
2024-07-30 02:40:39.604368 | controller | | obs_point_id

example failure:-
https://c33b3f5b3ef18e057f86-4f1ab06e880eb7499aa5249ca5a98f04.ssl.cf2.rackcdn.com/periodic/opendev.org/openstack/neutron/master/neutron-ovn-tempest-ipv6-only-ovs-master/eac2338/job-output.txt

Builds:- https://zuul.openstack.org/builds?job_name=neutron-ovn-tempest-ipv6-only-ovs-master&project=openstack/neutron

need to use OVS_BRANCH=branch3.4 to be compatible with OVN_BRANCH=main

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/c/openstack/neutron/+/925184

[OpenStack Infra (hudson-openstack)]

Change abandoned by "yatin <email address hidden>" on branch: master
Review: https://review.opendev.org/c/openstack/neutron/+/925184
Reason: in favor of https://review.opendev.org/c/openstack/neutron/+/925091