Move mirage plugin field to a factory. Now plugin inherits from host-catalog

addons/api/mirage/factories/host-set.js

@@ -12,4 +12,9 @@ export default factory.extend({
       'remove-hosts',
     ],
   id: (i) => `host-set-id-${i}`,
+  plugin() {
+    if (this.type === 'plugin') {
+      return this.hostCatalog.plugin;
+    }
+  },
 });

addons/api/mirage/generated/factories/host-set.js

@@ -11,13 +11,4 @@ export default Factory.extend({
   updated_time: () => date.recent(),
   version: () => datatype.number(),
   size: () => datatype.number(),
-  plugin: function (i) {
-    if (this.type == 'plugin') {
-      return {
-        id: `pl_${datatype.hexaDecimal(5)}`,
-        name: i % 2 ? 'aws' : 'azure',
-        description: random.words(),
-      };
-    }
-  },
 });