tests/functional: logs details of console interaction operations

tests/functional: logs details of console interaction operations

When functional tests go wrong, it will often be related to the console
interaction wait state. By logging the messages that we're looking for,
and data we're about to be sending, it'll be easier to diagnose where
tests are getting stuck.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20241121154218.1423005-13-berrange@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20241121165806.476008-13-alex.bennee@linaro.org>