Fixes #35961 - Simple Content Access API shouldn't check upstream connection

[jeremylenz]

What are the changes introduced in this pull request?

The organizations/:id/simple_content_access/ API endpoints were never updated after the upgrade to Candlepin 4.2. This means that

• you could not enable or disable SCA via the API
• you could not check SCA eligibility via the API

This change reflects that SCA is now tied to the organization, and no longer requires a connection to the upstream Candlepin consumer.

Considerations taken when implementing this change?

I'm not entirely sure if the /eligible endpoint is necessary any more. But I left it in for backward compatibility.

What are the testing steps for this pull request?

Get an organization with no manifest imported

curl -sku admin:changeme -H "content-type: application/json" -X PUT <server url>/katello/api/organizations/1/simple_content_access/disable

curl -sku admin:changeme -H "content-type: application/json" -X PUT <server url>/katello/api/organizations/1/simple_content_access/enable

curl -sku admin:changeme -H "content-type: application/json" -X GET <server url>/katello/api/organizations/1/simple_content_access/eligible

Before:

{"displayMessage":"Current organization does not have a manifest imported.","errors":["Current organization does not have a manifest imported."]}

After:

API responses as expected

[theforeman-bot]

Issues: #35961

[jeremylenz]

Fixed tests, ready for review ✔️

[chris1984]

Code looks sane, left one comment. Will start to test

[jeremylenz]

@chris1984 Added deprecation warning

[chris1984]

ACK, works great. Thanks for adding the dep warning @jeremylenz