Fix DateTime export to csv with culture info

[asmirnov82]

Fixes #7333

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.89%. Comparing base (886e2ff) to head (5cea57c).
Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #7358   +/-   ##
=======================================
  Coverage   68.88%   68.89%           
=======================================
  Files        1473     1473           
  Lines      270771   270814   +43     
  Branches    27884    27884           
=======================================
+ Hits       186529   186567   +38     
- Misses      76970    76976    +6     
+ Partials     7272     7271    -1     

Flag	Coverage Δ
Debug	68.89% <100.00%> (+<0.01%)	⬆️
production	63.20% <100.00%> (-0.01%)	⬇️
test	89.39% <100.00%> (+<0.01%)	⬆️

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Files with missing lines	Coverage Δ
src/Microsoft.Data.Analysis/DataFrame.IO.cs	83.57% <100.00%> (+0.06%)	⬆️
...Microsoft.Data.Analysis.Tests/DataFrame.IOTests.cs	99.17% <100.00%> (+0.02%)	⬆️

... and 5 files with indirect coverage changes