refactor(iroh): remove request token

[rklaehn]

Description

Removes the request token from iroh-bytes, and everywhere else

Notes & open questions

Ticket format changes. Do we care?

Change checklist

• Self-review.
• Documentation updates if relevant.
• Tests if relevant.

[divagant-martian]

quick rg "request token" -i gives me

iroh/src/commands/blob.rs
260:                // TODO: This is where we are missing the request token from the running

iroh-bytes/src/protocol.rs
325://! # Request tokens
327://! Request tokens are an optional feature of the protocol. They are opaque byte
329://! request tokens to implement request level authorization.

Also

Ticket format changes. Do we care?

I don't think so, we haven't versioned them so I think it's fine

[divagant-martian]

lgtm!