Bump dependencies after version 0.24

[wks]

This PR updates Cargo crates dependencies and GitHub Actions dependencies after v0.24 was released, with two exceptions:

• We do not update criterion because a later version unintentionally requires MSRV 1.74. The problem has been fixed in the upstream criterion repo, but has not been released, yet.
• We replaced actions-rs/toolchain with manual invocations of rustup because actions-rs/toolchain is no longer maintained. For tasks that don't require a specific toolchain, we rely on rustup and cargo to automatically install the toolchain specified by the file rust-toolchain upon first invocation.

Also disabled Clippy checks on Darwin because the clippy program itself randomly crashes on Darwin.

[qinsoon]

Some dependencies need Rust 1.74 or newer, which does not comply with our MSRV 1.71.1. I don't think it is worth to bump MSRV for this reason. Maybe revert the dependency?

[wks]

Some dependencies need Rust 1.74 or newer, which does not comply with our MSRV 1.71.1. I don't think it is worth to bump MSRV for this reason. Maybe revert the dependency?

The dependency is pulled in by criterion 0.5.1. clap is a command line parsing library, and I wonder why criterion needs that. I'll see if we can disable that dependency by disabling some of its Cargo features. But our "N-1" MSRV policy does allow us to bump MSRV up to 1.76, given that the version in rust-toolchain is 1.77.0.

[wks]

Criterion depends on clap version 4, but clap started to require Rust 1.74 after version 4.4.9. The Criterion developers noticed this problem, too (because Criterion intends to support MSRV 1.70), and locked the version of clap in a recent commit: bheisler/criterion.rs@9f1db4a which has not been released, yet.

I don't see what new feature of Rust 1.74 Clap is using, but according to Clap's doc, it only intends to supports N-2 MSRV. So it may be bumping MSRV for no reason. While that's compatible with our N-1 MSRV policy, I don't think it's necessary for us to bump our rust-version in Cargo.toml because (1) we don't directly depend on clap, and (2) the next release of criterion is likely to revert to MSRV 1.70, and (3) we don't use new features of criterion 0.5, either. So I reverted the criterion dependency to 0.4 and kept our rust-version unchanged.

[qinsoon]

LGTM

[wks]

I also removed dependencies on actions-rs/toolchain.

• For minimal-test-core/${target-triple}/${version}, I directly use rustup to install the needed toolchain.
• For other tests, such as check-public-api-changes and msrv, I don't invoke rustup explicitly, but upon the first invocation of rustup show, cargo --version or any other commands related to cargo, it will automatically install the toolchain specified in the file mmtk-core/rust-toolchain. The output of rustup show and cargo --version show that those tests are using the desired toolchains.

There is one small problem. rustup gave a warning when trying to install the i686-* toolchain. See #1107 for more details. That would require much changes to the CI scripts and I am not going to do that change in this PR. This PR focuses on removing outdated dependencies.