Auto merge of #97214 - Mark-Simulacrum:stage0-bump, r=pietroalbini

Finish bumping stage0

It looks like the last time had left some remaining cfg's -- which made me think
that the stage0 bump was actually successful. This brings us to a released 1.62
beta though.

This now brings us to cfg-clean, with the exception of check-cfg-features in bootstrap;
I'd prefer to leave that for a separate PR at this time since it's likely to be more tricky.

cc https://github.com/rust-lang/rust/pull/97147#issuecomment-1132845061

r? `@pietroalbini`

diff --cc src/bootstrap/builder.rs
Simple merge