Lockbud CI job doesn't ever fail

[eserilev]

Description

The lockbud CI job checks for any deadlocks in the codebase. However, if a deadlock is found, the CI job doesn't actually fail. Instead it just prints out some text related to the deadlock and the CI job is marked as completed succesfully.

It'd be much more helpful if the lockbud CI job actually failed when catching a deadlock.

There are two ways to potentially resolve this

1. Contribute to lockbud to resolve the issue described here.
2. Parse lockbud output like they do in this repo https://github.com/os-checker/os-checker and manually fail the CI job if a deadlock is found