fix(core): don't log wallet upon tx prebuild validation failure
fix(core): don't log wallet upon tx prebuild validation failure

There's not much useful info we can glean from the wallet object, and
it's a big object that creates a lot of logging noise.

Ticket: BG-30841

BitGo/BitGoJS,BitGo/BitGoJS,BitGo/BitGoJS,BitGo/BitGoJS