feat: optimize cases

Signed-off-by: SuZhou-Joe <suzhou@amazon.com>

cypress/integration/plugins/dashboards-assistant/chatbot_agent_framework_spec.js

@@ -43,15 +43,12 @@ if (Cypress.env('DASHBOARDS_ASSISTANT_ENABLED')) {
         // Click regenerate button
         cy.get(`button[title="regenerate message"]`).click();
 
-        // The previous message should be gone
+        // The previous message and the regenerate button should be gone
         cy.get(`button[title="regenerate message"]`).should('be.length', 0);
 
         // suggestions should be gone
         cy.get(`[aria-label="chat suggestions"]`).should('be.length', 0);
 
-        // wait for 1 second
-        cy.wait(1000);
-
         // The regenrate message should be there
         cy.contains(
           'The indices in your cluster are the names listed in the response obtained from using a tool to get information about the OpenSearch indices.'