BUG: Fix pd.read_csv cannot read pathlib.Path

[traderbxy]

What do these changes do?

Fix the BUG: pd.read_csv cannot read pathlib.Path

Related issue number

Fixes #734

Check code requirements

• tests added / passed (if needed)
• Ensure all linting tests pass

[codecov]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (e4a996f) 93.55% compared to head (2be01d6) 93.59%.

Files	Patch %	Lines
...hon/xorbits/_mars/dataframe/datasource/read_csv.py	60.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #757      +/-   ##
==========================================
+ Coverage   93.55%   93.59%   +0.03%     
==========================================
  Files        1059     1059              
  Lines       79781    79786       +5     
  Branches    16504    16506       +2     
==========================================
+ Hits        74640    74674      +34     
+ Misses       3461     3432      -29     
  Partials     1680     1680              

Flag	Coverage Δ
unittests	93.48% <60.00%> (+0.03%)	⬆️

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