Rollup merge of #135434 - dianne:match-2024-for-edition-2024, r=Nadrieril

Match Ergonomics 2024: update edition 2024 behavior of feature gates

This updates the edition 2024 behavior of the feature gates `ref_pat_eat_one_layer_2024_structural` and `ref_pat_eat_one_layer_2024` to correspond to the left and right typing rules compared [here](https://nadrieril.github.io/typing-rust-patterns/?compare=true&opts2=AQEBAAABAQABAgIAAQEBAAEBAAABAAA%3D&opts1=AQEBAgEBAQEBAgIAAAAAAAAAAAAAAAA%3D&mode=rules&do_cmp=true&ty_d=3&style=SequentBindingMode), respectively. I'll implement the proposed new behavior for editions ≤ 2021 in another PR.

The tests are split up a bit awkwardly for practical reasons, but I've added new tests from 3 places:
- I got tests for where the typing rules differ from the "Compare" tab of the page linked above. These had to be split up based on where the errors are emitted and how rustfixable they are, so they've ended up in different files to keep tidy. Within each file, though, the order of the tests matches the order the typing differences appear in that comparison (as of when this was written).
- I used [this other comparison](https://nadrieril.github.io/typing-rust-patterns/?q=%5B%26mut+%26%28mut+x%29%5D%3A+%26mut+%5B%26CT%5D&compare=true&opts2=AQEBAgABAQEBAgIAAQEBAAEBAAABAAA%3D&opts1=AQEBAgEBAQEBAgIAAAAAAAAAAAAAAAA%3D&mode=compare&do_cmp=true&ty_d=3&style=SequentBindingMode) to test the `Deref(EatInner, FallbackToOuter)` rule of the left/"structural"/eat-inner ruleset. These are all in `well-typed-edition-2024.rs`.
- I added some select tests for cases where the new typing rules differ from current stable Rust. I had to be pickier about what I included here, but I tried to make sure each typing rule got some coverage. That said, my approach for these tests was a bit ad-hoc, so I may have missed something.

Relevant tracking issue: #123076

r? ````@ghost````

Author: matthiaskrgr