Fix problematic MOTDs on bedrock servers breaking stats collection

What does this MR do and why?

Resolves #530 (closed)

Screenshots or screen recordings

See bug report

How to set up and validate locally

1. create bedrock server
2. set a non-ASCII character in the MOTD
3. verify that no errors are seen in the commander.log or terminal and correct MOTD shows up in GUI

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• Have you checked this doesn't interfere/conflict/duplicate someone elses work?
• Have you fully tested your changes?
• Have you resolved any lint issues?
• Have you assigned a reviewer?
• Have you applied correct labels?