Do not set logging level to emit all logs

[vivianrwu]

Set logger to emit all logs. Previously was set to INFO logs only then WARNING logs only. Not setting the logger will emit all logs. This reenables viewing the INFO logs in JetStream server logs.

Validated logic in maxengine-server to emit INFO logs-

2025-01-10 02:20:18,057 - root - INFO - Detokenizing generate step 209 took 22.56ms
INFO:root:Detokenizing generate step 210 took 22.98ms
{"message": "Detokenizing generate step 210 took 22.98ms","severity": "INFO", "logging.googleapis.com/labels": {"python_logger": "root"}, "logging.googleapis.com/trace": "", "logging.googleapis.com/spanId": "", "logging.googleapis.com/trace_sampled": false, "logging.googleapis.com/sourceLocation": {"line": 897, "file": "/usr/local/lib/python3.10/dist-packages/jetstream/core/orchestrator.py", "function": "_detokenize_thread"}, "httpRequest": {} }
2025-01-10 02:20:18,080 - root - INFO - Detokenizing generate step 210 took 22.98ms