Add API to suspend logging messages as breadcrumbs (aka prints)

[limbonaut]

Feature proposal:

• Let’s add an API to pause or disable logging messages as breadcrumbs (aka print statements).
• Sometimes, when we have a lot of prints, but we don’t need to log them, it would be great to have an API to temporarily stop logging those messages.
• We could use this when running unit tests, for instance. Some users may also find this useful.
• May become obsolete with the logging protocol.

[linear]

GODOT-78 Add API to suspend logging messages as breadcrumbs (aka prints)