[BACKPORT] fixup! feat: options for excluding courses from search (#28518)

[pkulkark]

This is a backport of #28518

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[natabene]

@pkulkark Thank you for your contribution. @BbrSofiane Can you please review and merge?

[mtyaka]

Thanks for this backport 👍

• I tested this: I tested that when using the two flags I can successfully remove invitation only and/or courses with catalog visibility set to "none" from the course discovery/search page.
• I read through the code
• I checked for accessibility issues
• Includes documentation

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