ssh: Fix debug logs
ssh: Fix debug logs

Add missing logname prefixes, so that `G_MESSAGES_DEBUG=cockpit-ssh`
works properly.

Closes #9988
mvollmer/cockpit,garrett/cockpit,cockpituous/cockpit,deryni/cockpit,cockpit-project/cockpit,andreasn/cockpit,deryni/cockpit,andreasn/cockpit,moraleslazaro/cockpit,cockpituous/cockpit,moraleslazaro/cockpit,martinpitt/cockpit,martinpitt/cockpit,moraleslazaro/cockpit,andreasn/cockpit,deryni/cockpit,moraleslazaro/cockpit,cockpit-project/cockpit,cockpituous/cockpit,moraleslazaro/cockpit,mvollmer/cockpit,mvollmer/cockpit,deryni/cockpit,martinpitt/cockpit,deryni/cockpit,cockpituous/cockpit,cockpit-project/cockpit,andreasn/cockpit,garrett/cockpit,cockpituous/cockpit,deryni/cockpit,martinpitt/cockpit,andreasn/cockpit,moraleslazaro/cockpit,cockpituous/cockpit,cockpit-project/cockpit,moraleslazaro/cockpit,mvollmer/cockpit,garrett/cockpit,andreasn/cockpit,martinpitt/cockpit,andreasn/cockpit,deryni/cockpit,cockpit-project/cockpit,garrett/cockpit,garrett/cockpit,mvollmer/cockpit