Auto merge of #84147 - cuviper:array-method-dispatch, r=nikomatsakis,m-ou-se

Cautiously add IntoIterator for arrays by value

Add the attribute described in #84133, `#[rustc_skip_array_during_method_dispatch]`, which effectively hides a trait from method dispatch when the receiver type is an array.

Then cherry-pick `IntoIterator for [T; N]` from #65819 and gate it with that attribute. Arrays can now be used as `IntoIterator` normally, but `array.into_iter()` has edition-dependent behavior, returning `slice::Iter` for 2015 and 2018 editions, or `array::IntoIter` for 2021 and later.

r? `@nikomatsakis`
cc `@LukasKalbertodt` `@rust-lang/libs`

diff --cc compiler/rustc_feature/src/builtin_attrs.rs
Simple merge

diff --cc compiler/rustc_span/src/symbol.rs
Simple merge

diff --cc compiler/rustc_typeck/src/check/method/probe.rs
Simple merge

diff --cc library/core/src/array/mod.rs
Simple merge

diff --cc library/std/src/primitive_docs.rs
Simple merge