Rollup merge of #135146 - Zalathar:anyhow-backtrace, r=jieyouxu

Don't enable anyhow's `backtrace` feature in opt-dist

As of the stabilization of `std::backtrace` in Rust 1.65, this package flag has no effect other than to enable an unused dependency on the `backtrace` crate.

(See <https://github.com/dtolnay/anyhow/blob/af0937ef72fbaf9784a6c991e029738728d025e2/Cargo.toml#L18-L23>.)

While the presence of this feature in opt-dist doesn't cause other tools (which use anyhow) to actually *build* backtrace, it does affect the global crate graph used for dependency version resolution. After removing this feature, we can use `cargo tree --invert --package backtrace` to see that the only remaining reverse-dependency of backtrace is `color-eyre`, which is used by `ui_test`.

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