Issue #2945041 by heddn, maxocub: Categorize derived migrations according to their type

...sts/src/Kernel/Plugin/migrate/DestinationCategoryTest.php

...migrate_drupal/tests/src/Traits/CreateMigrationsTrait.php

core/modules/node/migrations/d6_node.yml

core/modules/node/migrations/d6_node_revision.yml

core/modules/node/migrations/d6_node_translation.yml

core/modules/node/migrations/d7_node.yml

core/modules/node/migrations/d7_node_revision.yml

core/modules/node/migrations/d7_node_translation.yml

core/modules/taxonomy/migrations/d6_term_node.yml

core/modules/taxonomy/migrations/d6_term_node_revision.yml

core/modules/taxonomy/migrations/d7_taxonomy_term.yml