Auto merge of #109644 - pietroalbini:pa-1.68.2, r=pietroalbini

[stable] Prepare Rust 1.68.2

This PR prepares the 1.68.2 point release, including the following Cargo PRs:

* rust-lang/cargo#11883
* rust-lang/cargo#11889

The following PR was also included as a pre-requisite for backporting:

* rust-lang/cargo#11635

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