Ensure copy* intrinsics also perform the static self-init checks

[oli-obk]

fixes #142532

r? @RalfJung

[rustbot]

Some changes occurred to the CTFE machinery

cc @RalfJung, @oli-obk, @lcnr

Some changes occurred to the CTFE / Miri interpreter

cc @rust-lang/miri

[oli-obk]

Adding relnotes as this will break stable code if someone wrote such code in the last year, but there is absolutely no reason to do so, so not even gonna crater it.

[workingjubilee]

It's a soundness fix and is only reachable by having incorrect unsafe code that should be rejected by const eval anyway, right? Then we're justified in "break first, figure out how to migrate smoothly later".

[theemathas]

In theory, this could also affect code where there's correct unsafe code in one crate, and there's incorrect safe code in another crate misusing the first crate.