[8.15] [Lens] unskip flaky test (#190419) (#190514)

# Backport

This will backport the following commits from `main` to `8.15`:
- [[Lens] unskip flaky test
(#190419)](#190419)

<!--- Backport version: 9.4.3 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sqren/backport)

<!--BACKPORT [{"author":{"name":"Marta
Bondyra","email":"4283304+mbondyra@users.noreply.github.com"},"sourceCommit":{"committedDate":"2024-08-14T13:39:30Z","message":"[Lens]
unskip flaky test (#190419)\n\n## Summary\r\n\r\nFixes
https://github.com/elastic/kibana/issues/164623","sha":"f74d479014bd851b1f88f25d3b9886a71b8781d2","branchLabelMapping":{"^v8.16.0$":"main","^v(\\d+).(\\d+).\\d+$":"$1.$2"}},"sourcePullRequest":{"labels":["Team:Visualizations","release_note:skip","Feature:Lens","backport:prev-minor","v8.16.0"],"title":"[Lens]
unskip flaky
test","number":190419,"url":"https://github.com/elastic/kibana/pull/190419","mergeCommit":{"message":"[Lens]
unskip flaky test (#190419)\n\n## Summary\r\n\r\nFixes
https://github.com/elastic/kibana/issues/164623","sha":"f74d479014bd851b1f88f25d3b9886a71b8781d2"}},"sourceBranch":"main","suggestedTargetBranches":[],"targetPullRequestStates":[{"branch":"main","label":"v8.16.0","branchLabelMappingKey":"^v8.16.0$","isSourceBranch":true,"state":"MERGED","url":"https://github.com/elastic/kibana/pull/190419","number":190419,"mergeCommit":{"message":"[Lens]
unskip flaky test (#190419)\n\n## Summary\r\n\r\nFixes
https://github.com/elastic/kibana/issues/164623","sha":"f74d479014bd851b1f88f25d3b9886a71b8781d2"}}]}]
BACKPORT-->

Co-authored-by: Marta Bondyra <4283304+mbondyra@users.noreply.github.com>

x-pack/test/functional/apps/lens/group1/ad_hoc_data_view.ts

@@ -73,6 +73,14 @@ export default function ({ getService, getPageObjects }: FtrProviderContext) {
     expect(await dataViews.isAdHoc()).to.be(true);
   };
 
+  const waitForPageReady = async () => {
+    await PageObjects.header.waitUntilLoadingHasFinished();
+    await retry.waitFor('page ready after refresh', async () => {
+      const queryBarVisible = await testSubjects.exists('globalQueryBar');
+      return queryBarVisible;
+    });
+  };
+
   describe('lens ad hoc data view tests', () => {
     it('should allow building a chart based on ad hoc data view', async () => {
       await setupAdHocDataView();
@@ -225,9 +233,7 @@ export default function ({ getService, getPageObjects }: FtrProviderContext) {
       const [lensHandle] = await browser.getAllWindowHandles();
       await browser.switchToWindow(lensHandle);
     });
-
-    // Failing: See https://github.com/elastic/kibana/issues/164623
-    it.skip('should navigate to discover from embeddable correctly', async () => {
+    it('should navigate to discover from embeddable correctly', async () => {
       const [lensHandle] = await browser.getAllWindowHandles();
       await browser.switchToWindow(lensHandle);
       await PageObjects.header.waitUntilLoadingHasFinished();
@@ -247,6 +253,7 @@ export default function ({ getService, getPageObjects }: FtrProviderContext) {
         'new'
       );
 
+      await PageObjects.header.waitUntilLoadingHasFinished();
       await checkDiscoverNavigationResult();
 
       await browser.closeCurrentWindow();
@@ -256,6 +263,7 @@ export default function ({ getService, getPageObjects }: FtrProviderContext) {
 
       // adhoc data view should be persisted after refresh
       await browser.refresh();
+      await waitForPageReady();
       await checkDiscoverNavigationResult();
 
       await browser.closeCurrentWindow();