perf(cli): lazy import rechoir and interpret

[chenjiahan]

Summary

rechoir and interpret are only used when loading rspack.config.ts or rspack.config.mts.

Lazy importing them can make Rspack CLI 20ms faster in most cases.

Checklist

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

[netlify]

✅ Deploy Preview for rspack canceled.

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[codspeed-hq]

CodSpeed Performance Report

Merging #8856 will not alter performance

_{Comparing cli_lazy_import_1226 (7a6f7a4) with main (7707956)}

🎉 Hooray! codspeed-rust just leveled up to 2.7.2!

A heads-up, this is a breaking change and it might affect your current performance baseline a bit. But here's the exciting part - it's packed with new, cool features and promises improved result stability 🥳!
Curious about what's new? Visit our releases page to delve into all the awesome details about this new version.

Summary

✅ 3 untouched benchmarks