Fix E2E test reporting message for webhook (#29304)

* Fix testcases failing  Webpack compilation
* Fix E2E test report message for webhook
* Demote more unstable tests
* Fix playwright reporting message, better test demotion

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Co-authored-by: Mattermost Build <build@mattermost.com>

e2e-tests/cypress/tests/integration/channels/notifications/desktop_notifications_1_spec.js

@@ -115,7 +115,7 @@ describe('Desktop notifications', () => {
         });
     });
 
-    it('MM-T495 Desktop Notifications - Can set to DND and no notification fires on DM', () => {
+    it.skip('MM-T495 Desktop Notifications - Can set to DND and no notification fires on DM', () => {
         cy.apiCreateDirectChannel([otherUser.id, testUser.id]).then(({channel}) => {
             // # Ensure notifications are set up to fire a desktop notification if you receive a DM
             cy.apiPatchUser(testUser.id, {notify_props: {...testUser.notify_props, desktop: 'all'}});