Hide Config Enforce container on all content entity add/edit forms, not just for nodes

Problem/Motivation

In #3251911-15: Plug-in based config not correctly identified on config forms (e.g. text editor/CKEditor) we decided it may be a good idea to try and hide the Config Enforce container on all content entity add/edit forms, not just nodes.

Steps to reproduce

Install the core Media and Media Library modules, create a media type, go to create a new media item; notice the Config Enforce container is present.

Proposed resolution

Remove the check for the node entity type so this is applied to all content entities. See the merge request in #3251911: Plug-in based config not correctly identified on config forms (e.g. text editor/CKEditor) for relevant code.

Remaining tasks

See above.

User interface changes

Config Enforce container is now hidden on all content entity add/edit forms.

API changes

None.

Data model changes

Nun. Sorry, bad habit.