[Feature]: Disable LitLLM Print Message

[openhands-agent]

What problem or use case are you trying to solve?
The user wants to prevent LitLLM print messages from cluttering the console by disabling verbose output during the startup of OpenHands.

Describe the UX of the solution the user wants
The solution should disable verbose debug information from LitLLM by setting litellm.suppress_debug_info = True and litellm.set_verbose = False within logger.py, optionally enabling if DEBUG is set.

User's thoughts on the technical implementation?
This can be easily implemented by modifying the startup script to include those settings.

Describe the alternatives considered
<N/A>

Additional context
Based on the Slack thread, these changes are requested for a cleaner startup sequence without excess logging.

Issue Created By: Xingyao Wang on Slack

Link to Slack Thread: https://openhands-ai.slack.com/archives/C06U8UTKSAD/p1736862846135269?thread_ts=1736862846.135269&cid=C06U8UTKSAD

[openhands-agent]

OpenHands started fixing the issue! You can monitor the progress here.

[openhands-agent]

A potential fix has been generated and a draft PR #6274 has been created. Please review the changes.