[Discover] set local storage directly for large string spec (#1170)

Other test utilize the helper function and not seeing the particular need for this test
to ensure it switches. But by doing this avoid whatever is taking focus of the popover that
lets the test first click the button but before cypress test runner clicks the switch.

Issue:
n/a

Signed-off-by: Kawika Avilla <avillk@amazon.com>
Co-authored-by: Kawika Avilla <avillk@amazon.com>

cypress/integration/core-opensearch-dashboards/opensearch-dashboards/apps/data_explorer/large_string.spec.js

@@ -40,11 +40,16 @@ describe('test large strings', () => {
     });
   });
 
+  beforeEach(() => {
+    cy.window().then((win) =>
+      win.localStorage.setItem('discover:newExpereince', true)
+    );
+  });
+
   it('verify the large string book present', function () {
     // Go to the Discover page
     miscUtils.visitPage('app/data-explorer/discover#/');
     cy.waitForLoader();
-    cy.switchDiscoverTable('new');
 
     const ExpectedDoc = 'Project Gutenberg EBook of Hamlet';
 
@@ -67,7 +72,6 @@ describe('test large strings', () => {
 
     it('search Newsletter should show the correct hit count in datagrid table', function () {
       cy.log('test Newsletter keyword is searched');
-      cy.switchDiscoverTable('new');
       const expectedHitCount = '1';
       const query = 'Newsletter';
       cy.setTopNavQuery(query);