Pno/fix test get slice

[paulnoirel]

Description

This PR fixes a typo in the test test_get_slice:

 for slice in slices:
        _delete_catalog_slice(client, slice.uid)

instead of

 for slice in slices:
        _delete_catalog_slice(client, slice.id)

Fixes # (issue)

Type of change

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• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Document change (fix typo or modifying any markdown files, code comments or anything in the examples folder only)

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