[Fix] Ensure sites that can't be imported in current context are marked properly

[abaicus]

Summary

Make sure expired licenses do not list premium sites as importable. These were not previously importable, but were not locked in the UI.

Will affect visual aspect of the product

NO

Test instructions

• Refer to this comment https://github.com/Codeinwp/neve-pro-addon/issues/2994#issuecomment-2865898694
• Check that the websites are locked when the license is expired, inactive.

Check before Pull Request is ready:

• I have written a test and included it in this PR
• I have run all tests and they pass
• The code passes when running the PHP CodeSniffer
• Code meets WordPress Coding Standards for PHP, HTML, CSS and JS
• Security and Sanitization requirements have been followed
• I have assigned a reviewer or two to review this PR (if you're not sure who to assign, we can do this step for you)

Closes Codeinwp/neve-pro-addon#2994.

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