Issue #3481736 by jessebaker, tedbow, balintbrews: Adapt E2E tests to work with auto-save

src/Controller/NotTheGoodAutoSaveTrait.php

...ules/xb_e2e_support/src/Controller/AutoSaveController.php

tests/modules/xb_e2e_support/xb_e2e_support.info.yml

tests/modules/xb_e2e_support/xb_e2e_support.routing.yml

tests/src/TestSite/XBTestSetup.php

ui/tests/e2e/autosave.cy.js

ui/tests/e2e/canary.cy.js

ui/tests/e2e/component-operations.cy.js

ui/tests/e2e/components-slots.cy.js

ui/tests/e2e/contain-css.cy.js

ui/tests/e2e/contextual-panel.cy.js

ui/tests/e2e/copy-and-paste.cy.js

ui/tests/e2e/drag-and-drop.cy.js

ui/tests/e2e/empty-canvas.cy.js

ui/tests/e2e/error-handling.cy.js

ui/tests/e2e/overlay-ui.cy.js

ui/tests/e2e/primary-panel.cy.js

ui/tests/e2e/routing.cy.js

ui/tests/e2e/undo-redo.cy.js

ui/tests/e2e/xb-canvas.cy.js