Posts: Remove the slug from Quick Edit for CPTs with `publicly_queryable` disabled.

In the full edit screen, CPTs that have disabled the `publicly_queryable` option will hide the slug field, as it doesn't need to be edited. This change brings the Quick Edit view into line with that behaviour.

Props bhargavmehta, krutidugade.
Fixes #43278.


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git-svn-id: https://core.svn.wordpress.org/trunk@43493 1a063a9b-81f0-0310-95a4-ce76da25c4cd