CLD-7841 Optimize E2E testing costs (#27883)

* Utilize free runners for E2E tests, report back to PR on run completion
* Increase test stability on smaller instances
* Merge worker reports
* merge start+prepare steps
* upgrade keycloak
* increase test timeouts
* Add video recording to report artifacts

Co-authored-by: Saturnino Abril <5334504+saturninoabril@users.noreply.github.com>

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Co-authored-by: Saturnino Abril <5334504+saturninoabril@users.noreply.github.com>

e2e-tests/cypress/tests/integration/channels/archived_channel/post_menu_spec.ts

@@ -26,7 +26,9 @@ describe('Archived channels', () => {
 
     it('MM-T1721 Archive channel posts menu should have copy link and reply options', () => {
         // # Click to add a channel description
-        cy.findByRoleExtended('button', {name: 'Set header'}).should('be.visible').click();
+        //   Note that it is invisible until the mouse hovers it, which is unfeasible in Cypress
+        //   https://docs.cypress.io/api/commands/hover
+        cy.findByText('Add a channel header').click({force: true});
 
         // # Add channel header for system message
         const header = 'this is a header!';