migrate_state_finished_test's FieldLeft and FieldRight plugins are not namespaced correctly

Problem/Motivation

The files core/modules/migrate_drupal/tests/modules/migrate_state_finished_test/src/Plugin/migrate/field/FieldLeft.php and core/modules/migrate_drupal/tests/modules/migrate_state_finished_test/src/Plugin/migrate/field/FieldRight.php break PSR-2 and PSR-4 and cannot be autoloaded correctly.

Steps to reproduce

Proposed resolution

Determine if they are even needed anymore.

Remaining tasks

User interface changes

API changes

Data model changes

Release notes snippet