It turns out that the stale action is not able to delete its saved
state due to missing permissions. As a result, it was not processing
issues and PRs, that have been processed once, for almost a month.
The error in the job log was:
```
Warning: Error delete _state: [403] Resource not accessible by integration
```
The fix is to add `actions: write` to the action permissions
Signed-off-by: Tomáš Hozza <thozza@redhat.com>
We want to use a stable version of ubuntu, not ubuntu-latest which can
change unexpectedly. This switches all the other (non-test) workflows to
use ubuntu-22.04
