fix(ovn): if OVN has to encapsulate traffic, use geneve

If we use VXLAN as the encapsulation type then OVN sets the max ID to
4095. This is then enforced on all networks in the change
openstack/neutron@ef0ec21186d93e and users have reported this limitation
in https://bugs.launchpad.net/neutron/+bug/1951517 Since we're not
looking for OVN to establish VXLAN tunnels for us at this time we can
really ignore this because OVN ignores any ports and segments without a
physical_network setting. OpenStack enforces that VXLAN type does not
have a physical_network set so these won't be created in OVN.

Author: cardoe

components/ovn/values.yaml

@@ -7,7 +7,7 @@ conf:
   ovn_cms_options: ""
   ovn_cms_options_gw_enabled: "enable-chassis-as-gw"
   # we are working with baremetal so we'll need VTEP support
-  ovn_encap_type: vxlan
+  ovn_encap_type: geneve
 
 volume:
   ovn_ovsdb_nb: