Do not skip file-URL tests on windows

[christian-monch]

Fixes #6163

This PR activates the file-URL tests on windows-platforms

Changelog

🛡 Tests

• run file-URL tests on windows platforms

[codecov]

Codecov Report

Merging #6772 (20095ab) into maint (2f1c01f) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##            maint    #6772      +/-   ##
==========================================
- Coverage   91.20%   91.20%   -0.01%     
==========================================
  Files         354      354              
  Lines       44616    44615       -1     
==========================================
- Hits        40691    40690       -1     
  Misses       3925     3925              

Impacted Files	Coverage Δ
datalad/support/tests/test_network.py	100.00% <ø> (ø)
datalad/metadata/search.py	89.00% <100.00%> (ø)

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[yarikoptic]

coolio, thanks @christian-monch !

[github-actions]

🚀 PR was released in 0.16.7 🚀