Auto merge of #138521 - cuviper:stable-next, r=cuviper

[stable] Release 1.85.1

- [Fix the doctest-merging feature of the 2024 Edition.](https://github.com/rust-lang/rust/pull/137899/)
- [Relax some `target_feature` checks when generating docs.](https://github.com/rust-lang/rust/pull/137632/)
- [Fix errors in `std::fs::rename` on Windows 1607.](https://github.com/rust-lang/rust/pull/137528/)
- [Downgrade bootstrap `cc` to fix custom targets.](https://github.com/rust-lang/rust/pull/137460/)
- [Skip submodule updates when building Rust from a source tarball.](https://github.com/rust-lang/rust/pull/137338/)

Added backports to fix CI:

- Remove latest Windows SDK from 32-bit CI #137753
- Do not install rustup on Rust for Linux job #137947

cc `@rust-lang/release`
r? cuviper