Fixes #37966 - Rescue Candlepin error during force registration

[jeremylenz]

What are the changes introduced in this pull request?

Rescue Candlepin error during force registration
after deleting certs from host. In this situation
Katello tries to update the consumer it just deleted.

Also added a test.

Considerations taken when implementing this change?

This same thing was fixed in #10694 but has since popped up again. I figure a rescue will be more foolproof for next time.

What are the testing steps for this pull request?

See the Redmine issue https://projects.theforeman.org/issues/37966

[lfu]

Tested with RHEL 9.4.
Issue was re-produced.

[root@ip-10-xxx consumer]# rm -rf /etc/pki/consumer/*
[root@ip-10-xxx consumer]#  echo '' > /var/log/rhsm/rhsm.log
[root@ip-10-xxx consumer]# subscription-manager register --org="Default_Organization" --environment="Library" --force
Registering to: ip-10-xxx.xxx.redhat.com:443/rhsm
Username: admin
Password: 
Unit bf6a1ae8-e140-4b7b-960c-ffb0eb0bc007 has been deleted (HTTP error code 410: Gone)
[root@ip-10-xxx consumer]# echo $?
70

Was able to re-register the client with --force after patch was applied.

[root@ip-10-xxx consumer]# subscription-manager register --org="Default_Organization" --environment="Library" --force
Registering to: ip-10-xxx.xxx.redhat.com:443/rhsm
Username: admin
Password: 
The system has been registered with ID: 03087626-1e0c-43b5-80a2-605ae3bbbae0
The registered system name is: ip-10-xxx.xxx.redhat.com

[lfu]

LGTM 👍🏻