fix: loaderContext.importModule should return error

[colinaaa]

Summary

close: #8536

Related links

Fix the wrong test case introduced by #8590

Checklist

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

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[codspeed-hq]

CodSpeed Performance Report

Merging #10750 will not alter performance

_{Comparing colinaaa:colin/0620/import-module (7f0636e) with main (ee7d9bc)}

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Summary

✅ 16 untouched benchmarks