Fix version parsing NameError and older Python syntax compatibility

[umran666]

I was running some static analysis on the codebase and found a couple of minor but critical bugs which are:

1. Fixed a crash in import_fixes.py:
   In Version(), if an invalid version string was passed, the exception handler was trying to raise Exception(str(e)). However, the variable e was unbound, which would cause a secondary NameError and hide the actual parsing issue. I replaced this with a clean ValueError(f"Could not parse version: {version}").

2. Fixed a Python < 3.11 SyntaxError in kernels/moe/tests/common.py:
   In assert_indx_equal / the MoE tests, there was an unpacked tuple inside an array index (ref[*bad_idxs]). This syntax isn't supported in Python 3.9/3.10 and causes a hard syntax error. I removed the asterisk to use standard indexing (ref[bad_idxs]), which restores compatibility across all supported Python versions.

[gemini-code-assist]

Code Review

This pull request resolves a bug in unsloth/import_fixes.py where an undefined variable e was referenced when raising an exception, replacing it with a clear ValueError. Additionally, it corrects tensor indexing in unsloth/kernels/moe/tests/common.py by removing the unpacking operator * from bad_idxs. No review comments were provided, so there is no feedback to address.

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[Imagineer99]

CI passes on staging fork.

[Imagineer99]

Tested and works as expected. Verified the Python 3.9/3.10 syntax issue is fixed, the changed tensor indexing preserves behavior, and invalid version parsing now reports the intended underlying error instead of the secondary NameError. Merging.