fix python3.11 _ModuleTarget _ScriptTarget compatibility

[tgy]

python -m pdb myscript.py currently does not work under Python 3.11

This fixes it, based on changes proposed by @blueyed in #516

[petobens]

Hi @tgy, with this commit I'm getting the following when running python -m pdb -cc foo.py:

Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "/home/pedro/.local/lib/python3.11/site-packages/_pdbpp_path_hack/pdb.py", line 17, in <module>
    exec(compile(f.read(), pdb_path, 'exec'))
  File "/home/pedro/.local/lib/python3.11/site-packages/pdbpp.py", line 2222, in <module>
    globals()[name] = rebind_globals(func, globals())
                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/pedro/.local/lib/python3.11/site-packages/pdbpp.py", line 135, in rebind_globals
    _pdb = __import__("pdb", fromlist=("_ModuleTarget", "_ScriptTargetu"))
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/pedro/.local/lib/python3.11/site-packages/_pdbpp_path_hack/pdb.py", line 17, in <module>
    exec(compile(f.read(), pdb_path, 'exec'))
  File "/home/pedro/.local/lib/python3.11/site-packages/pdbpp.py", line 2222, in <module>
    globals()[name] = rebind_globals(func, globals())
                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/pedro/.local/lib/python3.11/site-packages/pdbpp.py", line 143, in rebind_globals
    raise ValueError("cannot handle func {!r}".format(func))
ValueError: cannot handle func <class 'pdb._ModuleTarget'>

[tgy]

It seems that the type comparison is not working. So I changed the code to use func.__name__ instead.

I'm seeing that pdbpp keeps restarting the program indefinitely. Seems weird. Can you guys debug on your side?

[petobens]

I'm seeing the same error as before.. I'll try to have a harder look but dunno what's going on..

[petobens]

@blueyed any pointers on this one? It would be really nice (even necessary) to get this working again on 3.11.. Thanks in advance.

[blueyed]

Closing in favor of #521.

[blueyed]

(but let's run CI on it still)