Auto merge of #94265 - Mark-Simulacrum:stable-next, r=Mark-Simulacrum
[stable] 1.59.0 artifacts (second round)
This backports (from 1.60, landed in #93001):
* Move return_self_not_must_use to pedantic rust-lang/rust-clippy#8302
Per a user report on the internals feedback thread, this lint is not behaving well in 1.59.
cc `@rust-lang/clippy` -- this is a stable backport of a patch, which we'll likely want to land in fairly short order to be in time for the release Thursday.
This PR also includes an adjustment to the release notes to reflect "Fix invalid special casing of the unreachable! macro #93179".
r? `@Mark-Simulacrum`
