feat(request-response): Add support for custom dial options when making request to disconnected peer

[nazar-pc]

Description

We discussed #5634 at one of the community calls and the ways to approach it, one of the challenges we discussed was around the argument type and how to handle the case where PeerId is not specified in DialOpts.

I went with a relatively straightforward route: use PeerId when it is specified (same behavior as before this PR) and use ConnectionId otherwise, wrapping both into an enum to use as a key in internal HashMap.

Implementation ended up being fairly simple with the only breaking change being peer field in request_response::Event::OutboundFailure changing from PeerId to Option<PeerId>.

Resolves #5634

Notes & open questions

One thing I do not like too much and only did for backwards compatibility purposes is additional impl From<&PeerId> for DialOpts such that existing calls continue to work. If changing &peer_id to peer_id is an acceptable breaking change then that impl can be removed.

Change checklist

• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• A changelog entry has been made in the appropriate crates