[Cashtab] Replace all console.log statements with error or info and remove debug logs

Summary:
T3485

In this way, we can use console.log for debug logs -- then quickly test if any debug logs are remaining.

This diff also removes some lingering debug logs from various places in the app.

Test Plan: grep -r console.log src/ -- still a few left, but they are removed in D15804

Reviewers: #bitcoin_abc, emack

Reviewed By: #bitcoin_abc, emack

Subscribers: emack

Differential Revision: https://reviews.bitcoinabc.org/D15810