Pass field information in context

When the linked_field_settings alter hook is invoked, it's applied to all fields of the entity. However, the hook is never supplied the information about the current field its operating on. The hook is only supplied with information about the entity (type, display, language, etc.) and the settings of the current field being operated on (linked, path, text, etc.).

Suggesting the hook be supplied with at least the field name via the hook's context argument. From there, the hook can get the rest of the field information via the entity object that is present in the context.