tests/functional: use self.log for all logging

Some tests are creating their on logger category which means any
output they log is not captured in base.log.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
[thuth: drop changes to reverse_debugging.py (it's WIP in other patches)]
Message-ID: <20250912182200.643909-7-berrange@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
5 files changed