fix(python): Handle special case correctly when slicing a LazyFrame

[petrosbar]

When sliced with the object slice(0, None, -1), LazyFrame returns incorrect result.

Fixes #15295

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.34%. Comparing base (705b148) to head (d9968dd).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #15297      +/-   ##
==========================================
+ Coverage   81.32%   81.34%   +0.01%     
==========================================
  Files        1360     1364       +4     
  Lines      176070   176566     +496     
  Branches     2526     2526              
==========================================
+ Hits       143183   143621     +438     
- Misses      32403    32461      +58     
  Partials      484      484              

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[ritchie46]

Thank you for the fix!