User Restrictions are not migrated from Drupal 7 to Drupal 9

Problem/Motivation

When migrating a Drupal 7 site, using user restrictions, over to Drupal 9, the user restriction entries won't migrate.

Steps to reproduce

Proposed resolution

Provide a way to migrate user restriction entries from Drupal 7 to Drupal 9.

Remaining tasks

User interface changes

API changes

Data model changes