Auto merge of #53697 - Cyres:const-fn-int-ops, r=oli-obk

Add more const int ops

r? @oli-obk

Tracking Issue: #53718

list of `const fn`s in this PR:

- `feature = const_int_rotate`
  - `rotate_left`
  - `rotate_right`
- `feature = const_int_wrapping`
  - `wrapping_add`
  - `wrapping_sub`
  - `wrapping_mul`
  - `wrapping_shl`
  - `wrapping_shr`
- `feature = const_int_overflowing`
  - `overflowing_add`
  - `overflowing_sub`
  - `overflowing_mul`
  - `overflowing_shl`
  - `overflowing_shr`
- `feature = const_int_sign`
  - `is_positive`
  - `is_negative`
- `feature = const_int_conversion`
  - `reverse_bits`
  - `to_le_bytes`
  - `to_ne_bytes`
  - `from_be_bytes`
  - `from_le_bytes`
  - `from_ne_bytes`
  - `reverse_bits`

Author: bors

src/libcore/lib.rs

@@ -120,6 +120,13 @@
 #![feature(const_slice_len)]
 #![feature(const_str_as_bytes)]
 #![feature(const_str_len)]
+#![feature(const_let)]
+#![feature(const_int_rotate)]
+#![feature(const_int_wrapping)]
+#![feature(const_int_sign)]
+#![feature(const_int_conversion)]
+#![feature(const_transmute)]
+#![feature(reverse_bits)]
 #![feature(non_exhaustive)]
 
 #[prelude_import]