Add separate tab & route for listing tokens on entity pages

Problem/Motivation

It's hard to find how to access the URLs, a person has to save the content then go back to edit the content again, open the "Temporary unpublished access" fieldset, create a token and then copy the URL.

Proposed resolution

Add a new tab (route) that provides the same functionality as is present on the "Temporary unpublished access" fieldset.

Remaining tasks

Build the changes.

User interface changes

A new tab would exist on entities that allowed content creators an easier way to find and use the functionality/

API changes

TBD

Data model changes

TBD