ci: ovn-kubernetes: Bump libovsdb to a6a173993830.

This is to match the ovn-kubernetes commit
ovn-org/ovn-kubernetes@b5b61bc64aae

Without it building the ovn-kubernetes container image fails because the
libovsdb modelgen doesn't generate the right type of NB/SB models.

Reported-at: https://mail.openvswitch.org/pipermail/ovs-dev/2023-March/402481.html
Reported-by: Ilya Maximets <i.maximets@ovn.org>
Signed-off-by: Dumitru Ceara <dceara@redhat.com>
Acked-by: Numan Siddique <numans@ovn.org>
(cherry picked from commit e0fe7d3)

.ci/ovn-kubernetes/Dockerfile

@@ -1,5 +1,5 @@
 ARG OVNKUBE_COMMIT=master
-ARG LIBOVSDB_COMMIT=8081fe24e48f
+ARG LIBOVSDB_COMMIT=a6a173993830
 
 FROM fedora:35 AS ovnbuilder
 

.github/workflows/ovn-kubernetes.yml

@@ -12,7 +12,7 @@ env:
   GO_VERSION: "1.18.4"
   K8S_VERSION: v1.24.0
   OVNKUBE_COMMIT: "master"
-  LIBOVSDB_COMMIT: "98c0bad3cff1"
+  LIBOVSDB_COMMIT: "a6a173993830"
   KIND_CLUSTER_NAME: ovn
   KIND_INSTALL_INGRESS: true
   KIND_ALLOW_SYSTEM_WRITES: true