Add new setting to prevent connected player errors in console

Requested Feature

Add a new config option to disable the error message when a connected player cannot connect.

https://github.com/PaperMC/Velocity/blob/372a3b28bd3bbaebf5934b4582dbb2feba70a93e/proxy/src/main/java/com/velocitypowered/proxy/connection/client/ConnectedPlayer.java#L718

Why is this needed?

Especially on big servers, the red error messages can spam the console, even when player connection messages are disabled (there is already a setting for logging connection messages)

Alternative Solutions

• don’t add a new setting and only add the config check for the log-player-connections boolean
• ignore these messages in console, wich can be very annoying or even confusing

Additional Information

The error is send here: https://github.com/PaperMC/Velocity/blob/372a3b28bd3bbaebf5934b4582dbb2feba70a93e/proxy/src/main/java/com/velocitypowered/proxy/connection/client/ConnectedPlayer.java#L718

Start at proxy/src/main/java/com/velocitypowered/proxy/connection/client/ConnectedPlayer.java around line 718 and inspect how the existing log-player-connections setting is handled. Determine whether to reuse that setting or add a separate option, then verify that disabled logging prevents the connected-player error from appearing in the console.