[leapp] IPU 7->8: conflict with nbdkit* packages

Issue

The below conflict in the DNF transaction can be seen during the in-place upgrade:

2023-12-06 20:57:43.633575 [ERROR] Actor: dnf_transaction_check
Message: DNF execution failed with non zero exit code.
Summary:
    Stderr: Failed to create directory /var/lib/leapp/el8userspace//sys/fs/selinux: Read-only file system
            Failed to create directory /var/lib/leapp/el8userspace//sys/fs/selinux: Read-only file system
            Warning: Package marked by Leapp to install not found in repositories metadata: ldns-utils
            Warning: Package marked by Leapp to upgrade not found in repositories metadata: gpg-pubkey leapp leapp-upgrade-el7toel8 python2-leapp
            Transaction check:


         Problem: cannot install the best update candidate for package nbdkit-1.8.0-4.el7.x86_64
          - problem with installed package nbdkit-1.8.0-4.el7.x86_64
          - package nbdkit-1.24.0-4.module+el8.6.0+14480+c0a3aa0f.x86_64 from rhel-8-for-x86_64-appstream-rpms requires nbdkit-server(x86-64) = 1.24.0-4.module+el8.6.0+14480+c0a3aa0f, but none of the providers can be installed
          - package nbdkit-1.24.0-4.module+el8.7.0+16689+53d59bc2.x86_64 from rhel-8-for-x86_64-appstream-rpms requires nbdkit-server(x86-64) = 1.24.0-4.module+el8.7.0+16689+53d59bc2, but none of the providers can be installed
          - package nbdkit-1.24.0-5.module+el8.8.0+17308+05924798.x86_64 from rhel-8-for-x86_64-appstream-rpms requires nbdkit-server(x86-64) = 1.24.0-5.module+el8.8.0+17308+05924798, but none of the providers can be installed
          - package nbdkit-1.24.0-5.module+el8.9.0+18724+20190c23.x86_64 from rhel-8-for-x86_64-appstream-rpms requires nbdkit-server(x86-64) = 1.24.0-5.module+el8.9.0+18724+20190c23, but none of the providers can be installed
          - package nbdkit-server-1.16.2-4.module+el8.3.0+6922+fd575af8.x86_64 from rhel-8-for-x86_64-appstream-rpms conflicts with nbdkit < 1.12 provided by nbdkit-1.4.2-4.module+el8+2586+bf759444.x86_64 from rhel-8-for-x86_64-appstream-rpms
          - package nbdkit-server-1.16.2-4.module+el8.3.0+6922+fd575af8.x86_64 from rhel-8-for-x86_64-appstream-rpms conflicts with nbdkit < 1.12 provided by nbdkit-1.4.2-4.module+el8.0.0+3075+09be6b65.x86_64 from rhel-8-for-x86_64-appstream-rpms
          - package nbdkit-server-1.16.2-4.module+el8.3.0+6922+fd575af8.x86_64 from rhel-8-for-x86_64-appstream-rpms conflicts with nbdkit < 1.12 provided by nbdkit-1.4.2-4.module+el8.0.0.z+3418+a72cf898.x86_64 from rhel-8-for-x86_64-appstream-rpms
          - package nbdkit-server-1.16.2-4.module+el8.3.0+6922+fd575af8.x86_64 from rhel-8-for-x86_64-appstream-rpms conflicts with nbdkit < 1.12 provided by nbdkit-1.4.2-5.module+el8.0.0+4084+cceb9f44.x86_64 from rhel-8-for-x86_64-appstream-rpms
          - package nbdkit-server-1.16.2-4.module+el8.3.0+6922+fd575af8.x86_64 from rhel-8-for-x86_64-appstream-rpms conflicts with nbdkit < 1.12 provided by nbdkit-1.4.2-5.module+el8.1.0+4066+0f1aadab.x86_64 from rhel-8-for-x86_64-appstream-rpms
          - cannot install both nbdkit-server-1.24.0-4.module+el8.6.0+14480+c0a3aa0f.x86_64 from rhel-8-for-x86_64-appstream-rpms and nbdkit-server-1.16.2-4.module+el8.3.0+6922+fd575af8.x86_64 from rhel-8-for-x86_64-appstream-rpms
          - cannot install both nbdkit-server-1.24.0-4.module+el8.7.0+16689+53d59bc2.x86_64 from rhel-8-for-x86_64-appstream-rpms and nbdkit-server-1.16.2-4.module+el8.3.0+6922+fd575af8.x86_64 from rhel-8-for-x86_64-appstream-rpms
          - cannot install both nbdkit-server-1.24.0-5.module+el8.8.0+17308+05924798.x86_64 from rhel-8-for-x86_64-appstream-rpms and nbdkit-server-1.16.2-4.module+el8.3.0+6922+fd575af8.x86_64 from rhel-8-for-x86_64-appstream-rpms
          - cannot install both nbdkit-server-1.24.0-5.module+el8.9.0+18724+20190c23.x86_64 from rhel-8-for-x86_64-appstream-rpms and nbdkit-server-1.16.2-4.module+el8.3.0+6922+fd575af8.x86_64 from rhel-8-for-x86_64-appstream-rpms
          - package nbdkit-python-plugin-1.16.2-4.module+el8.3.0+6922+fd575af8.x86_64 from rhel-8-for-x86_64-appstream-rpms requires nbdkit-server(x86-64) = 1.16.2-4.module+el8.3.0+6922+fd575af8, but none of the providers can be installed
          - cannot install the best candidate for the job
          - nbdkit-1.8.0-4.el7.x86_64 from @System  does not belong to a distupgrade repository
Stdout: Last metadata expiration check: 0:04:36 ago on Wed Dec  6 20:52:41 2023.