feat: use search endpoint in admin table

[ThibaudDauce]

• use /search endpoints when q is defined
• since the /api/2/datasets/search endpoint doesn't support some filters, disable it
• refactor org listing to use useAPI direct query params instead of building the URL

[maudetes]

I don't think it would work for non public datasets at the moment?

[ThibaudDauce]

I don't think it would work for non public datasets at the moment?

Yes didn't think that we don't index non public datasets…