fix: Check dtype to avoid panic with mixed types in min/max_horizontal

[kdn36]

Fixes #21835

(A prior attempt PR #21845 was closed by myself and can be ignored - I accidentally messed something up in git).

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.84%. Comparing base (5e24b89) to head (d78bcb4).
Report is 18 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #21857      +/-   ##
==========================================
- Coverage   80.92%   80.84%   -0.08%     
==========================================
  Files        1623     1628       +5     
  Lines      234177   235121     +944     
  Branches     2693     2693              
==========================================
+ Hits       189513   190090     +577     
- Misses      44032    44398     +366     
- Partials      632      633       +1     

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[ritchie46]

Thanks, can you add a test in python?

[kdn36]

I think this is ready to be merged. The CI failures seem unrelated, kindly review.

The only detail that is not straightforward (for me) is the use of 'i64' literal in the expected error message, vs eg 'i32'.