Auto merge of #107129 - wesleywiser:musl_1.2_upgrade, r=petrochenkov

Update the version of musl used on `*-linux-musl` targets to 1.2.3

Update the version of musl used on our Linux musl targets from 1.1.24 to 1.2.3 as proposed in rust-lang/compiler-team#572. musl 1.2.3 is the latest version of musl and supports the same range of Linux kernels as the 1.1 series. As such, it does not affect the minimum supported version of Linux for any of the musl targets.

One of the major musl 1.2 features is support for [time64](https://musl.libc.org/time64.html). This support is both source and ABI compatible with programs built against musl 1.1 and so updating the musl version for these targets should not cause Rust programs to fail to run or compile (a [crater run](rust-lang/rust#107129 (comment)) has been completed which demonstrates this for the `i686-unknown-linux-musl` target).

Once this change reaches stable, the `libc` crate will then be able to [update their definitions to support 64-bit time](rust-lang/libc#3068), matching the default musl 1.2 APIs exactly.

Fixes #91178

Author: bors