Add ability to skip access check for rendering an entity in the Entity display plugin

Motivation

I am updating from 2.6 to 2.12 and at some point an access check was added for FieldWidgetDisplay/RenderedEntity
I it could be handy to have a checkbox in the widget configuration that disables access checking for the entities rendered because sometime you just want to display the label + some other field and a lot of calculations can be save if the site builder knows a certain display mode is not dangerous and can be rendered "insecurely".

Currently I extend the RenderedEntity class and copy the view method without the access checking but I think the code can integrated better in the RenderedEntity class with a nice configuration form. Unchecked/off by default of course.

What do you think about adding this feature to the module?

Proposed resolution

Add a checkbox with the label "skip access checking for the rendered entity" in the config form and do a bypass the access check when the skip is enabled.

Remaining tasks

Code

User interface changes

New checkbox for configuration

API changes

Data model changes