leapp preupgrade fails with python error

[tuxmaster5000]

Actual behavior
When I try to convert an CentOS 7.9 to Rocky 8, the preupgrade check fails with an python error

To Reproduce
call leapp preupgrade

Expected behavior
That the tool will present an list of errors or none, when all will be fine

System information (please complete the following information):

• OS: CentOS 7.9
• # uname -a Linux XXXX 3.10.0-1160.76.1.el7.x86_64 Add README and initial Cockpit plugin leapp#1 SMP Wed Aug 10 16:21:17 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
• # rpm -qa "*leapp*" (or shorthashes of commits in case of manual installation):
  leapp-upgrade-el7toel8-0.16.0-6.el7.elevate.1.noarch
  leapp-deps-0.14.0-1.el7.noarch
  leapp-0.14.0-1.el7.noarch
  leapp-data-rocky-0.1-6.el7.noarch
  python2-leapp-0.14.0-1.el7.noarch
  leapp-upgrade-el7toel8-deps-0.16.0-6.el7.elevate.1.noarch

---

Additional context
Python error:

====> * vendor_signed_rpm_scanner
        Provide data about installed RPM Packages signed by Red Hat.
Process Process-290:
Traceback (most recent call last):
  File "/usr/lib64/python2.7/multiprocessing/process.py", line 258, in _bootstrap
    self.run()
  File "/usr/lib64/python2.7/multiprocessing/process.py", line 114, in run
    self._target(*self._args, **self._kwargs)
  File "/usr/lib/python2.7/site-packages/leapp/repository/actor_definition.py", line 72, in _do_run
    actor_instance.run(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/leapp/actors/__init__.py", line 290, in run
    self.process(*args)
  File "/usr/share/leapp-repository/repositories/system_upgrade/common/actors/redhatsignedrpmscanner/actor.py", line 125, in process
    "Package {} is unsigned, packager: {}, signature: {}".format(pkg.name, pkg.packager, pkg.pgpsig)
UnicodeEncodeError: 'ascii' codec can't encode character u'\xfc' in position 7: ordinal not in range(128)

[tuxmaster5000]

As an dirty workaround:
change line 125
from:
Package {} is unsigned, packager: {}, signature: {}".format(pkg.name, pkg.packager, pkg.pgpsig)
to:
Package {} is unsigned, packager: {}, signature: {}".format(pkg.name.encode('ascii', errors='ignore'), pkg.packager.encode('ascii',errors='ignore'), pkg.pgpsig)

[pirat89]

Switching to leapp-repository as leapp is only framework and does not know anything about upgrades.

[pirat89]

The same issue could happen for the packager field if using nonsense characters here too.