GH-145006: add ModuleNotFoundError hints when a module for a differen…

[FFY00]

Python 3.15.0a6+ free-threading build (heads/main-dirty:f282f7aed91, Feb 19 2026, 17:33:04) [GCC 15.2.1 20260209] on linux
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>>> import foo.ext
Traceback (most recent call last):
  File "<python-input-0>", line 1, in <module>
    import foo.ext
ModuleNotFoundError: No module named 'foo.ext'. Although a module with this name was found for a different Python version (cpython-315-x86_64-linux-gnu).

• Issue: Add ModuleNotFoundError hints when a module for a different ABI exists #145006