Fixes #38015 - Enable org and CVE scoping for flatpak content

[sjha4]

What are the changes introduced in this pull request?

Considerations taken when implementing this change?

1. Use host's IP address to identify and then filter content based on host's repositories.
2. If host is not identified, send the unfiltered flatpak index and allow normal flatpak operations. We could switch this tonot showing anything in the future once users are more accustomed to the flow?

What are the testing steps for this pull request?

Sync a few flatpak repos in different orgs and add them to some content view.
Create activation keys for those CVEs and then register a host using the key.
Setup a host to consume flatpak content from the katello server.
Try flatpak remote-ls and ensure you only see repos the host has access to.