fix(pytest): skip file-lock test on Windows

[spawn-guy]

fcntl is not working on Windows (as well as concurrent file opening)

if i'm not mistaken ;)

this PR skips failing test on Windows

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.33%. Comparing base (727dd11) to head (1f202af).
Report is 39 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2138   +/-   ##
=======================================
  Coverage   80.33%   80.33%           
=======================================
  Files          75       75           
  Lines        9121     9121           
  Branches     1348     1348           
=======================================
  Hits         7327     7327           
  Misses       1600     1600           
  Partials      194      194           

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