chore: rollback rust to nightly 2025-03-26

[LingyuCoder]

Summary

There is a bug in rust latest nightly version: rust-lang/rust#139110 and seems caused by rust-lang/rust#138824
So rollback to nightly-2025-03-26 which is just a day before that pr

Checklist

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

[netlify]

✅ Deploy Preview for rspack canceled.

Name	Link
🔨 Latest commit	fdfd014
🔍 Latest deploy log	https://app.netlify.com/sites/rspack/deploys/67f3907a1e23e300092e382f

[hardfist]

cc @andersk

[codspeed-hq]

CodSpeed Performance Report

Merging #9926 will not alter performance

_{Comparing chore/rollback-rust (fdfd014) with main (380afbe)}

🎉 Hooray! codspeed-node just leveled up to 4.0.1!

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

✅ 8 untouched benchmarks