IDT: Update identity-translator function to respect configuration.

[Bubbus]

Once we have config in place for identities and identity-assignment, we can go back to the function from Op Beer Battered and hook it up to the new system.

The process here will rely heavily on what you've done but in broad strokes:

• Check the unit's identity
• Skip assignment if it's a player
• Otherwise choose a random face/speaker and apply.

This will be random across localities - different players will see different faces on the same unit. I doubt it'll be noticed for now, and it can be rectified in firther iterations. This is enough to have a functioning system ready for use in ops.