Fixes #36674 - don't update Candlepin consumer when force-reregistering

[jeremylenz]

What are the changes introduced in this pull request?

Mark CVEs unchanged in remove_host_artifacts. This prevents backend_update_needed? from erroneously returning true during the process of host removal.

This was manifesting when you do a force reregister with subscription-manager without having consumer certs.

Considerations taken when implementing this change?

I considered passing around some sort of destroying_host? variable instead, but that seemed like too many hops to me, and reminded me of React prop drilling.

What are the testing steps for this pull request?

rm -rf /etc/pki/consumer/*
subscription-manager register --force --username=admin --password=changeme --org=Default_Organization --environment=Library

Before: The first attempt fails with

Registering to: centos8-katello-devel-stable.example.com:443/rhsm
Unit 547cf5fd-3ff0-44d9-b26c-5944bbbb9fbd has been deleted (HTTP error code 410: Gone)

The second attempt succeeds.

After: All attempts succeed.

also test other registration flows and make sure nothing is broken

[theforeman-bot]

Issues: #36674

[ianballou]

Looking great to me!