test: use a unique deploy alias per test group to avoid deploy concurrency issues (#2964)

* test: use a unique deploy alias per test group

See inline comment.

* test(deps): pin netlify-cli for now

There was a regression introduced in 21.3.0 and fixed in 22.0.0 But we cannot bump to 22.0.0 at the moment.

The regression causes builds to auto-install the Neon extension unconditionally.

Author: serhalp

.github/workflows/test-e2e.yml

@@ -198,6 +198,10 @@ jobs:
           NODE_ENV: production
           NEXT_EXTERNAL_TESTS_FILTERS: ${{ steps.test-filters.outputs.filters }}
           NEXT_TEST_SKIP_RETRY_MANIFEST: ${{ steps.test-filters.outputs.skip-retry }}
+          # Use a unique alias per test matrix group and shard. Otherwise, a deploy within
+          # one job may wait for deploys in other jobs (only one deploy may be in progress for
+          # a given alias at a time), resulting in cascading timeouts.
+          DEPLOY_ALIAS: vercel-next-e2e-${{ matrix.version_spec.selector }}-${{ matrix.group }}
         run: node run-tests.js -g ${{ matrix.group }}/${{ needs.setup.outputs.total }} -c ${TEST_CONCURRENCY} --type e2e
         working-directory: ${{ env.next-path }}