Add Rust v1.75.0 (Stable)

[andria-dev]

• Name: Rust
• Version: 1.75.0 (Stable)
• Release Note/Changelog: https://releases.rs/docs/1.75.0/ (released on 28 Dec 2023)

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:+1: reaction might help to get this request prioritized.

[kazk]

Yeah, I've been wanting to add newer Rust, but it's been blocked by #250.

I just found out that nextest recently added experimental/partial support for a machine-readable output format compatible with libtest JSON.

NEXTEST_EXPERIMENTAL_LIBTEST_JSON=1 \
    cargo nextest run --message-format libtest-json --message-format-version 0.1

https://nexte.st/book/run-machine-readable.html

We need to try this and see how it works.