feat: 🎸 Add support to display external name for dynamic hosts (#1664)

* feat: 🎸 Add support to display external name for dynamic hosts

✅ Closes: ICU-8795

addons/api/addon/models/host.js

@@ -29,6 +29,12 @@ export default class HostModel extends GeneratedHostModel {
   })
   external_id;
 
+  @attr('string', {
+    description: 'The external facing name for the plugin based host.',
+    readOnly: true,
+  })
+  external_name;
+
   // Aws specific
   @attr({
     readOnly: true,
@@ -89,4 +95,9 @@ export default class HostModel extends GeneratedHostModel {
       this.plugin = { name: type };
     }
   }
+
+  // Plugin hosts can support an external name
+  get displayName() {
+    return this.name || this.external_name || this.id;
+  }
 }