[24.1] Fix loading very old workflows with data inputs

[mvdbeek]

Fixes
https://sentry.galaxyproject.org/share/issue/d1cad9f916e8466f844ea3b49f52afcb/:

AttributeError: 'NoneType' object has no attribute 'get'
  File "galaxy/web/framework/middleware/error.py", line 167, in __call__
    app_iter = self.application(environ, sr_checker)
  File "galaxy/web/framework/middleware/statsd.py", line 29, in __call__
    req = self.application(environ, start_response)
  File "/cvmfs/main.galaxyproject.org/venv/lib/python3.11/site-packages/paste/httpexceptions.py", line 635, in __call__
    return self.application(environ, start_response)
  File "galaxy/web/framework/base.py", line 176, in __call__
    return self.handle_request(request_id, path_info, environ, start_response)
  File "galaxy/web/framework/base.py", line 271, in handle_request
    body = method(trans, **kwargs)
  File "galaxy/web/framework/decorators.py", line 74, in call_and_format
    rval = func(self, trans, *args, **kwargs)
  File "galaxy/webapps/galaxy/controllers/workflow.py", line 263, in load_workflow
    return workflow_contents_manager.workflow_to_dict(trans, stored, style="editor", version=version)
  File "galaxy/managers/workflows.py", line 926, in workflow_to_dict
    wf_dict = self._workflow_to_dict_editor(trans, stored, workflow)
  File "galaxy/managers/workflows.py", line 1239, in _workflow_to_dict_editor
    self.__set_default_label(step, module, step.tool_inputs)
  File "galaxy/managers/workflows.py", line 1958, in __set_default_label
    default_label = new_state.get("name")

and
https://sentry.galaxyproject.org/share/issue/92e8f30a288341e7b219e2c7c91390da/:

AttributeError: 'NoneType' object has no attribute 'get'
  File "starlette/applications.py", line 123, in __call__
    await self.middleware_stack(scope, receive, send)
  File "starlette/middleware/errors.py", line 186, in __call__
    raise exc
  File "starlette/middleware/errors.py", line 164, in __call__
    await self.app(scope, receive, _send)
  File "starlette_context/middleware/raw_middleware.py", line 92, in __call__
    await self.app(scope, receive, send_wrapper)
  File "starlette/middleware/base.py", line 189, in __call__
    with collapse_excgroups():
  File "contextlib.py", line 155, in __exit__
    self.gen.throw(typ, value, traceback)
  File "starlette/_utils.py", line 93, in collapse_excgroups
    raise exc
  File "starlette/middleware/base.py", line 191, in __call__
    response = await self.dispatch_func(request, call_next)
  File "galaxy/webapps/galaxy/fast_app.py", line 109, in add_x_frame_options
    response = await call_next(request)
  File "starlette/middleware/base.py", line 165, in call_next
    raise app_exc
  File "starlette/middleware/base.py", line 151, in coro
    await self.app(scope, receive_or_disconnect, send_no_error)
  File "starlette/middleware/exceptions.py", line 65, in __call__
    await wrap_app_handling_exceptions(self.app, conn)(scope, receive, send)
  File "starlette/_exception_handler.py", line 64, in wrapped_app
    raise exc
  File "starlette/_exception_handler.py", line 53, in wrapped_app
    await app(scope, receive, sender)
  File "starlette/routing.py", line 756, in __call__
    await self.middleware_stack(scope, receive, send)
  File "starlette/routing.py", line 776, in app
    await route.handle(scope, receive, send)
  File "starlette/routing.py", line 297, in handle
    await self.app(scope, receive, send)
  File "starlette/routing.py", line 77, in app
    await wrap_app_handling_exceptions(app, request)(scope, receive, send)
  File "starlette/_exception_handler.py", line 64, in wrapped_app
    raise exc
  File "starlette/_exception_handler.py", line 53, in wrapped_app
    await app(scope, receive, sender)
  File "starlette/routing.py", line 72, in app
    response = await func(request)
  File "fastapi/routing.py", line 278, in app
    raw_response = await run_endpoint_function(
  File "fastapi/routing.py", line 193, in run_endpoint_function
    return await run_in_threadpool(dependant.call, **values)
  File "starlette/concurrency.py", line 42, in run_in_threadpool
    return await anyio.to_thread.run_sync(func, *args)
  File "anyio/to_thread.py", line 56, in run_sync
    return await get_async_backend().run_sync_in_worker_thread(
  File "anyio/_backends/_asyncio.py", line 2144, in run_sync_in_worker_thread
    return await future
  File "anyio/_backends/_asyncio.py", line 851, in run
    result = context.run(func, *args)
  File "galaxy/webapps/galaxy/api/workflows.py", line 1159, in show_workflow
    return self.service.show_workflow(trans, workflow_id, instance, legacy, version)
  File "galaxy/webapps/galaxy/services/workflows.py", line 243, in show_workflow
    **self._workflow_contents_manager.workflow_to_dict(trans, stored_workflow, style=style, version=version)
  File "galaxy/managers/workflows.py", line 930, in workflow_to_dict
    wf_dict = self._workflow_to_dict_instance(trans, stored, workflow=workflow, legacy=False)
  File "galaxy/managers/workflows.py", line 1663, in _workflow_to_dict_instance
    step_label = step.label or step.tool_inputs.get("name")

This is for https://usegalaxy.org/workflows/export?id=ea97d3a23e6d38e6

(Please replace this header with a description of your pull request. Please include BOTH what you did and why you made the changes. The "why" may simply be citing a relevant Galaxy issue.)
(If fixing a bug, please add any relevant error or traceback)
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• I've included appropriate automated tests.
• This is a refactoring of components with existing test coverage.
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  1. [add testing steps and prerequisites here if you didn't write automated tests covering all your changes]

License

• I agree to license these and all my past contributions to the core galaxy codebase under the MIT license.