test: fix shims disable test

[Timeless0911]

Summary

Related Links

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

[Copilot]

Pull Request Overview

This PR fixes a type checking bug in the shims disable test configuration. The original code incorrectly checked if distPath was an object when it should have been checking for string, leading to the condition never being true and the path replacement never executing.

Key Changes:

• Corrected type guard from object to string for distPath
• Simplified the path replacement logic to directly assign to distPath

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