Config field dependencies are not checked on uninstall

Problem/Motivation

Steps to reproduce

Field module provides an uninstall validator, FieldUninstallValidator, which checks that a module being uninstalled doesn't provide the field type plugin for any active fields.

However, if a field's config declares a config dependency, that is not checked on uninstall.

This could result in a broken field or entity type - for example, if the module being uninstalled provides the callback_allowed_values_function() for a field.

Proposed resolution

Add another ModuleUninstallValidatorInterface to field module which checks field and field storage config dependencies.

Remaining tasks

User interface changes

API changes

Data model changes

Release notes snippet