message: [CI] reduce e2e test parallelism
  Following up reduce e2e test parallelism as it is no longer
  on the critical path.
  Closes:
  Approved by: metajack
diff: @@ -249,7 +249,7 @@ jobs:
  - target/debug/deps/libratest*
  run-e2e-test:
  executor: test-executor
  - parallelism: 8
  + parallelism: 4
  description: Run E2E tests in parallel. Each container runs a subset of
  test targets.
  environment:
  