test(ContextMenu): Run suite on iframe outside of Storybook

The Storybook app currently throws some `console.errors`. These are warnings from the Emotion library.

storybookjs/storybook#17911
storybookjs/storybook#6998

They have been working to resolve them upstream but don't appear to have caught all of them.

packages/react-component-library/cypress/specs/ContextMenu/index.spec.ts

@@ -8,9 +8,11 @@ describe('ContextMenu', () => {
   describe('Storybook: Docs Mode', () => {
     describe('the user opens the menu', () => {
       before(() => {
-        cy.visit('/iframe.html?id=context-menu--default&viewMode=docs')
+        cy.visit('/iframe.html?viewMode=story&id=context-menu--default')
 
-        cy.get(selectors.contextMenu.target).eq(0).rightclick()
+        cy.get(selectors.contextMenu.target)
+          .eq(0)
+          .rightclick({ scrollBehavior: false })
       })
 
       it('should show the Context Menu unobscured', () => {