Enable Cypress and Playwright retries (#29056)

* Enable Cypress and Playwright retries
* Improve E2E commit status messages
* Demote unstable testcases, increase task timeout

e2e-tests/cypress/tests/integration/channels/performance/channel_switch_spec.js

@@ -7,7 +7,6 @@
 // - Use element ID when selecting an element. Create one if none.
 // ***************************************************************
 
-// Stage: @prod
 // Group: @channels @channel
 
 import {measurePerformance} from './utils.js';