Add option to suppress INFO logs in elastic_transport.transport while retaining WARNING and ERROR logs

[everaldorodrigo]

Feature Request

Currently, elastic_transport.transport logs every request at the INFO level, which can lead to cluttered logs in production environments. While INFO logs may not always be necessary, retaining WARNING and ERROR logs is critical for identifying potential issues and errors.

Use Case:

• In a Tornado application interacting with Elasticsearch, frequent INFO logs from elastic_transport.transport dominate the log output. For example:

Nov 22 15:30:59 ip-172-30-1-34 python[115073]: [INFO elastic_transport.transport:271] POST http://elasticsearch:9200/mygene_index/_search?rest_total_hits_as_int=true [status:200 duration:0.006s]

These logs are less useful in normal operation but can mask more important WARNING and ERROR messages.

• Current workaround involves manually setting the log level:

import logging
logging.getLogger("elastic_transport.transport").setLevel(logging.WARNING)