Remove docker_image field on WorkerVersion model

arkindex/documents/fixtures/data.json

arkindex/documents/management/commands/bootstrap.py

arkindex/documents/management/commands/cleanup.py

arkindex/documents/tests/commands/test_cleanup.py

arkindex/documents/tests/commands/test_load_export.py

arkindex/process/admin.py

...ocess/migrations/0035_remove_workerversion_dockerimage.py

arkindex/process/models.py

arkindex/process/serializers/imports.py

arkindex/process/serializers/workers.py

arkindex/process/tests/test_corpus_worker_runs.py

arkindex/process/tests/test_create_process.py

arkindex/process/tests/test_docker_worker_version.py

arkindex/process/tests/test_processes.py

arkindex/process/tests/test_templates.py

arkindex/process/tests/test_user_workerruns.py

arkindex/process/tests/test_workerruns.py

arkindex/process/tests/test_workers.py

arkindex/project/checks.py

arkindex/sql_validation/indexer_prefetch.sql