Renaming discussions containing spaces does not work

Description:

Discussions containing a space in the name can be created, but not renamed.

Steps to reproduce:

1. Create a discussion containing a space in the name
2. Try to rename it to another name containing a space

Expected behavior:

The discussion is succesfully renamed

Actual behavior:

error-invalid-room-name

Server Setup Information:

• Version of Rocket.Chat Server: 6.5.2
• Operating System: Ubuntu 22.04.3 LTS
• Deployment Method: docker
• Number of Running Instances: 1
• DB Replicaset Oplog: enabled
• NodeJS Version: 14.21.3
• MongoDB Version: 6.0.13

Client Setup Information

Not relevant, happens to multiple users inside the org with entirely different configurations

Additional context

This only happens when UI_Allow_room_names_with_special_chars is set to false, which is the default. A workaround is to temporarily enable this setting.

Relevant logs:

{
    "success": false,
    "error": "test new name is not a valid room name. [error-invalid-room-name]",
    "errorType": "error-invalid-room-name",
    "details": {
        "function": "RocketChat.getValidRoomName",
        "channel_name": "test new name"
    }
}

Start by tracing the RocketChat.getValidRoomName entry point named in the log and the discussion-renaming path. Reproduce the rename with UI_Allow_room_names_with_special_chars set to false, then verify that names containing spaces are accepted consistently when renaming.