Bump Rust version to 1.74.1

[def-]

Fixes: #24818
Release notes: https://releases.rs/docs/1.74.1/
The fix we need for aarch64 compilation is rust-lang/rust#118464

Checklist

• This PR has adequate test coverage / QA involvement has been duly considered.
• This PR has an associated up-to-date design doc, is a design doc (template), or is sufficiently small to not require a design.
• If this PR evolves an existing $T ⇔ Proto$T mapping (possibly in a backwards-incompatible way), then it is tagged with a T-proto label.
• If this PR will require changes to cloud orchestration or tests, there is a companion cloud PR to account for those changes that is tagged with the release-blocker label (example).
• This PR includes the following user-facing behavior changes:

[ParkMyCar]

You should also bump the NIGHTLY_RUST_DATE

Thanks!

[nrainer-materialize]

Disabling auto-merge because of @ParkMyCar's comment.

[benesch]

You should also bump the NIGHTLY_RUST_DATE

Unless I'm missing it this could still use a bump. I think it's fine to defer that bump until the 1.76 bump though.

[def-]

Indeed. I tried bumping the nightly version but that failed because of various reasons, so I tried a few versions inbetween, but they all fail for some reasons. Fixing the newest version will require a new version of nextest to be released, so I didn't want to block this since rustc is still panicking and making CI slightly annoying.

[benesch]

Yup makes sense! Removing the ARM segfaults seems more important.