Make External-facing networks available to all tenants

External-facing networks, at least in Openstack, are supposed
to be scoped to all tenants. This updates the tenant_id
clause for CloudNetworks to consider whether external_facing
is true when deciding whether to allow a tenant to see a network.

Fixes https://bugzilla.redhat.com/show_bug.cgi?id=1779536

app/models/cloud_network.rb

@@ -52,7 +52,7 @@ def self.class_by_ems(ext_management_system, _external = false)
   end
 
   def self.tenant_id_clause_format(tenant_ids)
-    ["((tenants.id IN (?) OR cloud_networks.shared IS TRUE) AND ext_management_systems.tenant_mapping_enabled IS TRUE) OR ext_management_systems.tenant_mapping_enabled IS FALSE OR ext_management_systems.tenant_mapping_enabled IS NULL", tenant_ids]
+    ["((tenants.id IN (?) OR cloud_networks.shared IS TRUE OR cloud_networks.external_facing IS TRUE) AND ext_management_systems.tenant_mapping_enabled IS TRUE) OR ext_management_systems.tenant_mapping_enabled IS FALSE OR ext_management_systems.tenant_mapping_enabled IS NULL", tenant_ids]
   end
 
   private