Hide Rabbit Hole field from UI and enable/disable automatically

Problem/Motivation

Once the field is ready in #3336935: Create "Rabbit Hole" field type for overrides, let's make it not configurable via UI. Basically, we have to replicate the Layout Builder feature, where field with section overrides becomes available when "Override" option is enabled.

In our case, the checkbox that either enables or disables the field is available on Rabbit Hole bundle settings:
1) Go to /admin/config/content/rabbit-hole/ page;
2) Configure one of the content types;
3) "Allow these settings to be overridden for individual entities";

If the checkbox is selected, the field should be available, and vice versa.

Please look into Layout Builder implementation for the inspiration:
LayoutBuilderEntityViewDisplay::addSectionField()