fix(fixture): support running fixtures on mingw64

[bukowa]

Description

Fixes #705

Motivation and Context

See issue.

How Has This Been Tested?

Locally.

Screenshots / Logs (if applicable)

Types of Changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation (no code change)
• Refactor (refactoring production code)
• Other

Checklist:

• My code follows the code style of this project.
• I have updated the documentation accordingly.
• I have formatted the code with rustfmt.
• I checked the lints with clippy.
• I have added tests to cover my changes.
• All new and existing tests passed.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 36.22%. Comparing base (bea4916) to head (c23201e).

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Additional details and impacted files

@@           Coverage Diff           @@
##             main     #708   +/-   ##
=======================================
  Coverage   36.22%   36.22%           
=======================================
  Files          19       19           
  Lines        1455     1455           
=======================================
  Hits          527      527           
  Misses        928      928           

Flag	Coverage Δ
unit-tests	36.22% <ø> (ø)

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[orhun]

LGTM