Temporarily skip this test for Python 3.9.

When the parsed command python code is run on 3.9, I get:

File ".../lib/python3.9/site-packages/lldb/plugins/parsed_cmd.py", line 124, in translate_value
    return cls.translators[value_type](value)
TypeError: 'staticmethod' object is not callable

But this works correctly in Python 3.10 on macOS and Linux.  I'm guessing something
changed between those versions, and I'll have to do something to work around the difference.
But I'm going to skip the test on 3.9 while I figure that out.