fix(ast): estree compat MemberExpression

[hi-ogawa]

Part of #2854

I added a bit weird macro add_entry(computed = true) to add constant. Likely this is not the best way. I would appreciate any suggestion for a better approach 🙏

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[codspeed-hq]

CodSpeed Performance Report

Merging #8921 will not alter performance

_{Comparing hi-ogawa:fix-estree-compat-member-expression (4a43e01) with main (6942d2d)}

Summary

✅ 33 untouched benchmarks

[overlookmotel]

I've pushed a few commits purely for code style nits. I'll follow up with a PR for more substantive changes. But yes, nice! We need an #[estree(add_entry)] attribute. This will be useful for other types too.