test(cypress): embeddable iFrame basic validation

Signed-off-by: Raju Udava <sivadstala@gmail.com>

scripts/cypress/support/page_objects/mainPage.js

@@ -317,6 +317,10 @@ export class _mainPage {
                 })
             })        
     }
+
+    getIFrameCell = (columnHeader, cellNumber) => {
+        return cy.iframe().find(`tbody > :nth-child(${cellNumber}) > [data-col="${columnHeader}"]`)
+    }
 }