Apply map to entire record/stream instead of a field

[seajhawk]

I need to replace unicode characters throughout files with many fields, where I do not know the field names ahead of time.

Using __else__ may be a good approach, but currently else only supports null to drop non-specified fields.

For more information, see this Slack thread: https://meltano.slack.com/archives/CMN8HELB0/p1675097123619129?thread_ts=1675083559.152229&cid=CMN8HELB0