BUG: Fix test_ctypeslib and test_indexing for debug interpreter

[tadeu]

…preter

See #7563

[charris]

I suspect the fix should be in load_library, which already tries two variant file name extensions from get_shared_lib_extension. Remind me of where exactly the _d comes from?

[tadeu]

The _d suffix is expected for pyd files when using the debug version of python (python_d.exe).

There was a previous PR doing the change in load_library (PR #7563), but it was rejected, and in the discussion it was decided that the fix should be in the client side:

Yes, afaics the _d suffix needs to be added on the user side, not in load_library. (@pv)

#7563 (comment)

I think it is safer to fix in the test too, since load_library is generic for any dll, and not specific to pyd files.

[charris]

A note that this is a check for running in a debug version of Python would be helpful.

[charris]

Thanks @tadeu .