test: migrate util message tests from Python to JS

[Vansh1811]

Migrates test/message/util_inspect_error and test/message/util-inspect-error-cause tests from the Python-based test runner to JavaScript, following the established pattern from #47498.

Changes:

• Moves test/message/util_inspect_error.js to test/fixtures/util/util_inspect_error.js (updates require path)
• Renames test/message/util_inspect_error.out to test/fixtures/util/util_inspect_error.snapshot
• Moves test/message/util-inspect-error-cause.js to test/fixtures/util/util-inspect-error-cause.js (updates require path)
• Renames test/message/util-inspect-error-cause.out to test/fixtures/util/util-inspect-error-cause.snapshot
• Adds test/parallel/test-node-output-util.mjs as the JS test runner using assertSnapshot.spawnAndAssert
• Removes the old .js and .out files from test/message/

Closes#47707 (partial - migrates util tests)

Ref: #47707

[Vansh1811]

Hi team! This PR migrates test/message/util_inspect_error and test/message/util-inspect-error-cause tests from the Python-based test runner to JavaScript, following the established pattern from #47498.

The implementation is complete — could a collaborator please trigger CI by running @nodejs-github-bot run CI? Would appreciate a review when you get a chance. Thank you!

[github-actions]

This pull request has been marked as stale due to 90 days of inactivity.
It will be automatically closed in 30 days if no further activity occurs. If this is still relevant, please leave a comment or update it to keep it open.

[Vansh1811]

Still relevant — reopening for review. @nodejs-github-bot run CI

This PR is ready for review; implementation is complete. Could a collaborator please trigger CI and take a look when possible? Thanks!