Build neutron-sriov-agent image when enabled

Set kolla_enable_neutron_sriov, and the neutron-sriov-agent image does
not get built. This change fixes the issue.

Story: 2009275
Task: 43530
Change-Id: Ide13ad5d39388a3d484bb0285adf49e978239515

ansible/group_vars/all/kolla

@@ -202,6 +202,8 @@ overcloud_container_image_regex_map:
     enabled: "{{ kolla_enable_neutron | bool }}"
   - regex: neutron-mlnx-agent
     enabled: "{{ kolla_enable_neutron_mlnx | bool }}"
+  - regex: neutron-sriov-agent
+    enabled: "{{ kolla_enable_neutron_sriov | bool }}"
   - regex: ^nova
     enabled: "{{ kolla_enable_nova | bool }}"
   - regex: ^octavia
@@ -556,6 +558,7 @@ kolla_enable_multipathd: "no"
 kolla_enable_murano: "no"
 kolla_enable_neutron_mlnx: "no"
 kolla_enable_neutron_provider_networks: "no"
+kolla_enable_neutron_sriov: "no"
 kolla_enable_octavia: "no"
 kolla_enable_openvswitch: "{{ kolla_enable_neutron | bool }}"
 kolla_enable_ovn: "no"

releasenotes/notes/build-neutron-sriov-836acf378bae0b48.yaml

+---
+fixes:
+  - |
+    Fixes an issue where the Neutron SR-IOV agent image is not built when the
+    service is enabled.