Issue #3408698 by lauriii, alexpott: Provide alter for the field type UI definitions

core/lib/Drupal/Core/Field/FieldTypePluginManager.php

...lib/Drupal/Core/Field/FieldTypePluginManagerInterface.php

core/modules/comment/comment.module

core/modules/field/field.api.php

.../modules/field/tests/modules/field_test/field_test.module

...les/field/tests/src/Kernel/FieldTypePluginManagerTest.php

core/modules/field_ui/src/Form/FieldStorageAddForm.php

...odules/field_ui/tests/src/Functional/ManageFieldsTest.php