Resolve "Update and delete a workflow"

app/api/endpoints/workflow.py

app/api/endpoints/workflow_version.py

app/api/utils.py

app/crud/crud_workflow.py

app/crud/crud_workflow_version.py

app/git_repository/__init__.py

app/git_repository/abstract_repository.py

app/schemas/workflow.py

app/schemas/workflow_version.py

app/tests/api/test_workflow.py

app/tests/conftest.py

app/tests/crud/test_workflow.py

app/tests/crud/test_workflow_version.py