Allow more executor intepretations

[liamhuber]

Right now we allow an instance or a creator with args and kwargs:

pyiron_workflow/pyiron_workflow/mixin/run.py

Lines 19 to 21 in 309c68f

	InterpretableAsExecutor: TypeAlias = (
	StdLibExecutor | tuple[Callable[..., StdLibExecutor], tuple, dict]
	)

It would be nice to also allow just the creating callable (implicit no args or kwargs) or just args/kwargs (implicit no kwargs/args) so that you can write things like wf.my_node.executor = ProcessPoolExecutor or wf.my_node.executor = (ThreadPoolExecutor, {"max_workers": 2})