CLD-6867 E2E Tests - Decouple cycle creation from test running (#25367)

* Separate test cycle generation from test running

---------

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

e2e-tests/.ci/dashboard.generate_test_cycle.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+set -e -u -o pipefail
+cd "$(dirname "$0")"
+. .e2erc
+
+mme2e_log "Loading variables from .env.cypress"
+if ! [ -f .env.cypress ]; then
+  mme2e_log "Error: .env.cypress is required to exist, for the test cycle to be generated. Aborting." >&2
+  exit 1
+fi
+set -a
+. .env.cypress
+
+mme2e_log "Generating the test cycle on the Automation Dashboard"
+cd ../cypress
+# shellcheck disable=SC2086
+exec node --trace-warnings generate_test_cycle.js $TEST_FILTER