`TypeError: expected str, not NoneType` when using `tkinter` due to `sys.argv = [None]`

Hi, thanks for the awesome project!

Some info:
* Platform: Windows 10
* Tested with both Python 3.8 and 3.9 (though my system Python has always been just 3.8)
* Didn't test with Python 3.10, but from what I can see from `tkinter`'s source code, nothing has changed.

I have a pretty basic `pyoxidizer.bzl` ([gist](https://gist.github.com/fofoni/284c2e79657465d65356bd434988fd17)). When the executable reaches the line `root = tkinter.Tk()` in my `.py` module (i.e. the interpreter has already successfully imported `tkinter`), it fails [here](https://github.com/python/cpython/blob/v3.8.12/Lib/tkinter/__init__.py#L2265) with `TypeError: expected str, bytes or os.PathLike object, not NoneType`. This is because apparently PyOxidizer is setting `sys.argv = [None]`, but `tkinter.Tk.__init__` expects `sys.argv[0]` to be a string.

Fortunately for me, `tkinter` [doesn't actually *use*](https://github.com/python/cpython/blob/v3.8.12/Modules/_tkinter.c#L3227) `sys.argv[0]`, it's apparently just dead code in Python's implementation. My problem goes away when I do `tkinter.Tk(baseName="")` instead of `tkinter.Tk()`.

I have two questions. First is: I searched a lot but didn't find this in the documentation (in particular, not [here](https://pyoxidizer.readthedocs.io/en/stable/pyoxidizer_packaging_tkinter.html)), and also didn't find this reported anywhere. Am I doing something too different from what people usually do to use tkinter from PyOxidizer? Why hasn't anyone tripped on this before?

Second question: shouldn't PyOxidizer set `sys.argv[0]` to a string? Either something like `""` or `""`, or maybe the path to the `.exe` being executed, or even just the name of the `.exe` file? Or does this make no sense on Windows? (I'm not used to coding on Windows.)

If the answer to the second question is yes, I'd be willing to send a PR. Otherwise, I'm not sure how I could help; maybe try patching the Python used in `default_python_distribution()` to allow `tkinter` to work with `sys.argv[0]=None`? I see you haven't released Python 3.8.13 yet.

Thanks again!

Start with the linked pyoxidizer.bzl reproduction and the tkinter.Tk() failure described at CPython Lib/tkinter/__init__.py line 2265. Read the PyOxidizer tkinter packaging documentation and the default_python_distribution() entry point to determine where sys.argv is initialized. Done means the Windows reproduction no longer raises the TypeError, with the intended sys.argv[0] behavior documented or covered by an appropriate test.

Written by the indexing model from the issue text.