Rollup merge of rust-lang#102275 - Urgau:stabilize-half_open_range_patterns, r=cjgillot

Stabilize `half_open_range_patterns`

This PR stabilize `feature(half_open_range_patterns)`:
```
Allows using `..=X` as a pattern.
```

And adds a new `feature(half_open_range_patterns_in_slices)` for the slice part, rust-lang#102275 (comment).

The FCP was completed in rust-lang#67264.

Author: JohnTitor

tests/ui/match_overlapping_arm.rs

@@ -1,5 +1,5 @@
 #![feature(exclusive_range_pattern)]
-#![feature(half_open_range_patterns)]
+
 #![warn(clippy::match_overlapping_arm)]
 #![allow(clippy::redundant_pattern_matching)]
 #![allow(clippy::if_same_then_else, clippy::equatable_if_let)]