[Fix] Close FileHandler in Windows to make the temporary directory can be deleted

[cir7]

Motivation

[Fix] Close FileHandler in Windows to make the temporary directory can be deleted

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (227a49c) 76.27% compared to head (826c7d4) 76.27%.

❗ Current head 826c7d4 differs from pull request most recent head f268d61. Consider uploading reports for the commit f268d61 to get more accurate results

Additional details and impacted files

@@           Coverage Diff            @@
##           dev-1.x    #2565   +/-   ##
========================================
  Coverage    76.27%   76.27%           
========================================
  Files          170      170           
  Lines        13876    13876           
  Branches      2368     2368           
========================================
  Hits         10584    10584           
  Misses        2727     2727           
  Partials       565      565           

Flag	Coverage Δ
unittests	76.27% <ø> (ø)

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