rpc: retreive pin names when Detailed option provided

[djdv]

Closes: #10965

1. This prevents holding on to fields between iterations that don't get overwritten; so that things like Name don't stick.
2. This adds in the detailed option to the API request. The data and option constructor for this already existed, but seemingly wasn't used anywhere? Or I missed the references. In any case, this adds it to the request whether its true or false, as configurable via coreoptions.Pin.Ls.Detailed()
   This seems to match the documentation:

// Detailed is an option for [Pin.Ls] which sets whether or not to return
// detailed information, such as pin names and modes.

This should be a small bugfix, but if anyone thinks it belongs in the changelog, let me know and either I can add it or someone else can just push it themselves.

[hsanjuan]

I'm unfamiliar with client, but in principle this seems ok. Maybe the others can point out any non-obvious ramifications.