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/notifications/direct_messages_do_not_add_indicator_spec.js

@@ -7,7 +7,6 @@
 // - Use element ID when selecting an element. Create one if none.
 // ***************************************************************
 
-// Stage: @prod
 // Group: @channels @notifications
 
 describe('Notifications', () => {

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';

e2e-tests/cypress/tests/integration/playbooks/channels/rhs/status_update_spec.js

@@ -6,7 +6,6 @@
 // - [*] indicates an assertion (e.g. * Check the title)
 // ***************************************************************
 
-// Stage: @prod
 // Group: @playbooks
 
 /* eslint-disable no-only-tests/no-only-tests */

e2e-tests/cypress/tests/integration/playbooks/channels/slash_command/commands_spec.js

@@ -6,7 +6,6 @@
 // - [*] indicates an assertion (e.g. * Check the title)
 // ***************************************************************
 
-// Stage: @prod
 // Group: @playbooks
 
 import {switchToChannel} from '../../../channels/mark_as_unread/helpers';

e2e-tests/cypress/tests/integration/playbooks/channels/slash_command/todo_spec.js

@@ -6,7 +6,6 @@
 // - [*] indicates an assertion (e.g. * Check the title)
 // ***************************************************************
 
-// Stage: @prod
 // Group: @playbooks
 
 describe('channels > slash command > todo', {testIsolation: true}, () => {