fido2: add emoji to log message whenever "up" or "uv" is requested

Let's show the touch emoji whenever the user is likely going to have to
interact with the security token. We had this at many but not all such
messages. Let's add it everywhere.

Also, upgrade all messages where the user is supposed to do something to
LOG_NOTICE. Previously some where at LOG_NOTICE and others at LOG_INFO.
These messages are more than informational after all, they require user
action, hence deserve the higher prio, in particular as that formats
them bold with our usual log coloring.

Always use the word "test" in log messages, instead of "check".

Finally, always use the same wording: "confirm presence on security
token" for "up" and "verify user on security token" for "uv"