Expose Publish Experience Builder Content permission to the client UI

Overview

In 📌 Add a Publish Experience Builder Content permission Postponed we defined a permission “Publish Experience Builder Content” in order to be able to publish changes.

We need to expose that to the client UI.

Proposed resolution

• Expose access to the new permission as xb.permissions.publishChanges.
• Update related tests

User interface changes

Flag for "Publish Experience Builder Content" can be used in the client UI.