Fix and turn back on legacy embeddable tests

test/plugin_functional/config.js

@@ -33,18 +33,7 @@ export default async function ({ readConfigFile }) {
       require.resolve('./test_suites/app_plugins'),
       require.resolve('./test_suites/custom_visualizations'),
       require.resolve('./test_suites/panel_actions'),
-
-      /**
-       * @todo Work on re-enabling this test suite after this is merged. These tests pass
-       * locally but on CI they fail. The error on CI says "TypeError: Cannot read
-       * property 'overlays' of null". Possibly those are `overlays` from
-       * `npStart.core.overlays`, possibly `npStart.core` is `null` on CI, but
-       * available when this test suite is executed locally.
-       *
-       * See issue: https://github.com/elastic/kibana/issues/43087
-       */
-      // require.resolve('./test_suites/embeddable_explorer'),
-
+      require.resolve('./test_suites/embeddable_explorer'),
       require.resolve('./test_suites/core_plugins'),
     ],
     services: {

test/plugin_functional/plugins/kbn_tp_embeddable_explorer/public/np_ready/public/legacy.ts

@@ -18,6 +18,8 @@
  */
 /* eslint-disable @kbn/eslint/no-restricted-paths */
 import 'ui/autoload/all';
+
+import 'uiExports/interpreter';
 import 'uiExports/embeddableFactories';
 import 'uiExports/embeddableActions';