Add an endpoint to delete Worker Results linked to a WorkerVersion

arkindex/documents/api/elements.py

arkindex/documents/tasks.py

arkindex/documents/tests/tasks/test_worker_results_delete.py

arkindex/documents/tests/test_destroy_worker_results.py

arkindex/project/api_v1.py

arkindex/project/triggers.py

arkindex/sql_validation/worker_results_delete_in_corpus.sql

...dex/sql_validation/worker_results_delete_under_parent.sql

...alidation/worker_results_delete_under_parent_included.sql