Support for optimistic channel handshake initiation from the state machine

[ancazamfir]

Summary

From Aditya's message:

[...] want to flag a potential issue that may arise in the medium-term future.
One thing i see emerging is the handshake INIT messages are more and more being sent by the state machine itself (e.g. ICS). afaik, the relayers are equipped to handle this when its a channel handshake or connection handshake

but I am not sure if this works if the state machine is starting both handshakes at once (this is allowed)

in this case, the relayer should complete the connection handshake before it sends the ChanOpenTry which will expect the underlying connection to be OPEN

Problem Definition

This combination needs to be tested as we do not have official support for it. Any problems need to be fixed.

Proposal

tbd

Acceptance Criteria

tbd

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