Auto merge of #151291 - jhpratt:rollup-CVsL9ZN, r=jhpratt

Rollup of 8 pull requests

Successful merges:

 - rust-lang/rust#148769 (Stabilize `alloc_layout_extra`)
 - rust-lang/rust#150200 (Add title field to `ice.md` issue template)
 - rust-lang/rust#150955 (Underscore-prefixed bindings are explicitly allowed to be unused)
 - rust-lang/rust#151200 (time: Add saturating arithmetic for `SystemTime`)
 - rust-lang/rust#151235 (Change field `bit_width: usize` to `bits: u32` in type info)
 - rust-lang/rust#151242 (Port #[needs_allocator] to attribute parser)
 - rust-lang/rust#151274 (Include a link to `count_ones` in the docs for `uN::count_zeros` [docs only])
 - rust-lang/rust#151279 (remove trailing periods in built-in attribute gate messages)

r? @ghost

Author: bors

patches/0027-sysroot_tests-128bit-atomic-operations.patch

@@ -14,11 +14,10 @@ diff --git a/coretests/tests/lib.rs b/coretests/tests/lib.rs
 index 1e336bf..35e6f54 100644
 --- a/coretests/tests/lib.rs
 +++ b/coretests/tests/lib.rs
-@@ -2,5 +2,4 @@
+@@ -2,4 +2,3 @@
  // tidy-alphabetical-start
 -#![cfg_attr(target_has_atomic = "128", feature(integer_atomics))]
  #![cfg_attr(test, feature(cfg_select))]
- #![feature(alloc_layout_extra)]
  #![feature(array_ptr_get)]
 diff --git a/coretests/tests/atomic.rs b/coretests/tests/atomic.rs
 index b735957..ea728b6 100644