Fixes flakiness on timelion suggestions (#89538)

* Fixes flakiness on timelion suggestions

* Improvements

* Remove flakiness

Co-authored-by: Kibana Machine <42973632+kibanamachine@users.noreply.github.com>

test/functional/apps/timelion/_expression_typeahead.js

@@ -75,18 +75,18 @@ export default function ({ getPageObjects }) {
           await PageObjects.timelion.updateExpression(',split');
           await PageObjects.timelion.clickSuggestion();
           const suggestions = await PageObjects.timelion.getSuggestionItemsText();
-          expect(suggestions.length).to.eql(51);
+          expect(suggestions.length).not.to.eql(0);
           expect(suggestions[0].includes('@message.raw')).to.eql(true);
-          await PageObjects.timelion.clickSuggestion(10, 2000);
+          await PageObjects.timelion.clickSuggestion(10);
         });
 
         it('should show field suggestions for metric argument when index pattern set', async () => {
           await PageObjects.timelion.updateExpression(',metric');
           await PageObjects.timelion.clickSuggestion();
           await PageObjects.timelion.updateExpression('avg:');
-          await PageObjects.timelion.clickSuggestion(0, 2000);
+          await PageObjects.timelion.clickSuggestion(0);
           const suggestions = await PageObjects.timelion.getSuggestionItemsText();
-          expect(suggestions.length).to.eql(2);
+          expect(suggestions.length).not.to.eql(0);
           expect(suggestions[0].includes('avg:bytes')).to.eql(true);
         });
       });