Inform users when their site's privacy policy is not publicly visible

[desrosj]

When a page is selected as the site's privacy policy and is not published, users that can edit the privacy policy should be notified that the page is not publicly visible.

Currently, the only way to know that the selected privacy policy page is unpublished is to go to Pages in the admin and see the page listed with - Draft next to its title. #44100 will add - Draft to the page titles in the settings dropdown, but that is not visible unless viewing the Settings > Privacy page.

#44131 aims to adjust some of the text on the Settings > Privacy page to indicate the page would be previewed and not viewed, but this is also only seen when on that settings page.

Here are a few ideas that have been thrown tossed around.

Dashboard Widget

A dashboard widget for Privacy that could indicate any issues with the site's privacy settings. Some examples of what could appear here:

• "Your site does not have a privacy policy selected."
• "The privacy policy page selected is not publicly visible"
• Maybe further down the road, "Several active plugins on your site do not declare support for data privacy features" (see #43938, #43750).

Admin Notice

This admin warning would be dismissible and only show up to users that have the ability to manage the privacy policy. Which pages to show this on and whether another admin notice should be introduced should be carefully considered.

Related: #44100, #44131.

[karmatosed]

I am going to remove the feedback keyword as this seems to first need design at this point.