Use SS58 AccountIDs in logs?

[HCastano]

As mentioned in #1228 (comment), we currently
log TSS account IDs (and probably other account IDs) as byte arrays. It would be nicer if
we could log them as SS58 formatted addresses.

The main thing here would be to ensure consistency in our logs, ensuring that we don't
mix up both byte-arrays and SS58 addresses needlessly. Otherwise this will make debugging
issues harder since we'll constantly be converting between them on the side.