Test fix in main Celery worker tests leaking logging handler onto captured stdout

[anishgirianish]

The Celery worker CLI tests call the real configure_logging(output=sys.stdout.buffer), which installs a logging handler on pytest's captured stdout. Once the capture buffer closes, every later test's setup/teardown logging fails with I/O operation on closed file, surfacing in the Postgres-backed Special test jobs (Pendulum2 / LatestBoto).

This adds an autouse fixture stubbing configure_logging (matching what TestWorkerJsonLogs already does per-test), so the handler is never installed

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