Fixes #38011 - Apply environment filter for content override

[nadjaheitmann]

What are the changes introduced in this pull request?

When overriding the status on the repository sets page, the state was internally changed. However, it did not show but instead an empty error toast was shown.

Considerations taken when implementing this change?

In structured-apt feature, we use a specific environment to show the correct repo entry, otherwise we would show multiple entries for one repository. We need to apply this environment filter when the override is evaluated.

What are the testing steps for this pull request?

1. Enable structured-apt feature
2. Create ActivationKey with deb-repositories
3. Roll out a Debian host
4. Go to Host --> HostDetails --> Content --> Repository Sets
5. Try to change any override setting in the repo's kebab menu