test: remove leftover node:path module from e2e tests

[Marukome0743]

Summary

Remove leftover references to the Node-specific node:path module from all end-to-end test fixtures and standardize on the built-in path import.

Enhancements:

• Clean up test code by using the standard path module import

Tests:

• Drop node:path imports from every e2e fixture’s index.test.ts file

Related Issue or Pull Request

The most of node:path was unnecessary when moved all the test files to its fixture folder at #2247.

Tip

You can remove unused imports using noUnusedImports rule in Biome.

      "correctness": {
        "useExhaustiveDependencies": "off",
+       "noUnusedImports": "error"
      },

Checklist

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

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