Rollup merge of #91444 - RalfJung:miri-tests, r=dtolnay

disable tests in Miri that take too long

Comparing slices of length `usize::MAX` diverges in Miri. In fact these tests even diverge in rustc unless `-O` is passed. I tried this code to check that:
```rust
#![feature(slice_take)]

const EMPTY_MAX: &'static [()] = &[(); usize::MAX];

fn main() {
    let mut slice: &[_] = &[(); usize::MAX];
    println!("1");
    assert_eq!(Some(&[] as _), slice.take(usize::MAX..));
    println!("2");
    let remaining: &[_] = EMPTY_MAX;
    println!("3");
    assert_eq!(remaining, slice);
    println!("4");
}
```
So, disable these tests in Miri for now.

0 files changed, 0 insertions, 0 deletions