Fix build issues on latest stable Rust toolchain (1.84)

[Omega359]

Describe the bug

1.84 was released today and /dev/rust_lint.sh does not currently pass under this release.

To Reproduce

No response

Expected behavior

No response

Additional context

No response

[niebayes]

I've also noticed that this implicit upgrade causes CI to fail, particularly for rust clippy check.

[niebayes]

take

[jonahgao]

Since it blocks many PRs, I created #14065 to fix it. cc @niebayes

[niebayes]

Feel free. I got stuck in fixing clippy warnings unexpected cfg ....