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/.ci/server.run_cypress.sh

@@ -29,15 +29,16 @@ EOF
 
 # Run cypress test
 # No need to collect its exit status: if it's nonzero, this script will terminate since we use '-e'
+LOGFILE_SUFFIX="${CI_BASE_URL//\//_}" # Remove slashes from CI_BASE_URL to produce a usable filename
 # shellcheck disable=SC2016
 if ${MME2E_DC_SERVER} exec -T -u "$MME2E_UID" -- cypress bash -c '[ -n "${AUTOMATION_DASHBOARD_URL}" ]'; then
   mme2e_log "AUTOMATION_DASHBOARD_URL is set. Using run_test_cycle.js for the cypress run"
-  ${MME2E_DC_SERVER} exec -T -u "$MME2E_UID" -- cypress node run_test_cycle.js | tee ../cypress/logs/cypress.log
+  ${MME2E_DC_SERVER} exec -T -u "$MME2E_UID" -- cypress node run_test_cycle.js | tee ../cypress/logs/${LOGFILE_SUFFIX}_cypress.log
 else
   mme2e_log "AUTOMATION_DASHBOARD_URL is unset. Using run_tests.js for the cypress run"
   # shellcheck disable=SC2086
-  ${MME2E_DC_SERVER} exec -T -u "$MME2E_UID" -- cypress node run_tests.js $TEST_FILTER | tee ../cypress/logs/cypress.log
+  ${MME2E_DC_SERVER} exec -T -u "$MME2E_UID" -- cypress node run_tests.js $TEST_FILTER | tee ../cypress/logs/${LOGFILE_SUFFIX}_cypress.log
 fi
 
 # Collect server logs
-${MME2E_DC_SERVER} logs --no-log-prefix -- server >../cypress/logs/mattermost.log 2>&1
+${MME2E_DC_SERVER} logs --no-log-prefix -- server >../cypress/logs/${LOGFILE_SUFFIX}_mattermost.log 2>&1