refactor rust library logging

[zoedberg]

currently all logs in the rust library are performed at the info level.
several logs could be too verbose so we should use different logging levels.

I propose to use debug logs to show the received requests in their entirety and to use info to just show that a request has been received (without printing the request params).

[dr-orlovsky]

Approach I use in RGB Node and LNP Node:

1. All large objects can be print only with trace! and never with debug/info!
2. There must be only a single info per operation'; today it is done already in methods inside RGB Node (for things like consignment acceptance etc)
3. All the rest is debug!