Update reports dashboards test (#1089) (#1096)

Adds data test sub

Signed-off-by: Rupal Mahajan <maharup@amazon.com>
(cherry picked from commit a3e704b)

Co-authored-by: Rupal Mahajan <maharup@amazon.com>

Author: opensearch-trigger-bot[bot]

cypress/integration/plugins/reports-dashboards/04-download.spec.js

@@ -73,9 +73,7 @@ describe('Cypress', () => {
     cy.wait(5000);
 
     // open saved search list
-    cy.get(
-      'button.euiButtonEmpty:nth-child(3) > span:nth-child(1) > span:nth-child(1)'
-    ).click({ force: true });
+    cy.get('[data-test-subj="discoverOpenButton"]').click({ force: true });
     cy.wait(5000);
 
     // click first entry