Auto merge of #110019 - jplatte:jplatte/stabilize-is-some-and, r=Amanieu

Stabilize is_some_and

This stabilizes the following public API:

```rust
impl<T> Option<T> {
    pub fn is_some_and(self, f: impl FnOnce(T) -> bool) -> bool;
}

impl<T, E> Result<T, E> {
    pub fn is_ok_and(self, f: impl FnOnce(T) -> bool) -> bool;
    pub fn is_err_and(self, f: impl FnOnce(E) -> bool) -> bool;
}
```

Closes #93050 (tracking issue).

`@rustbot` label +T-libs-api -T-libs

Author: bors

src/lib.rs

@@ -5,7 +5,6 @@
 #![feature(io_error_more)]
 #![feature(variant_count)]
 #![feature(yeet_expr)]
-#![feature(is_some_and)]
 #![feature(nonzero_ops)]
 #![feature(local_key_cell_methods)]
 #![feature(is_terminal)]