Auto merge of #137446 - matthiaskrgr:rollup-16moy6v, r=matthiaskrgr

Rollup of 6 pull requests

Successful merges:

 - #135501 (Inject `compiler_builtins` during postprocessing and ensure it is made private)
 - #137121 (stabilize `(const_)ptr_sub_ptr`)
 - #137180 (Give `global_asm` a fake body to store typeck results, represent `sym fn` as a hir expr to fix `sym fn` operands with lifetimes)
 - #137256 (compiler: untangle SIMD alignment assumptions)
 - #137383 (stabilize `unsigned_is_multiple_of`)
 - #137415 (Remove invalid suggestion of into_iter for extern macro)

r? `@ghost`
`@rustbot` modify labels: rollup

Author: bors

src/lib.rs

@@ -16,7 +16,6 @@
 #![feature(unqualified_local_imports)]
 #![feature(derive_coerce_pointee)]
 #![feature(arbitrary_self_types)]
-#![feature(unsigned_is_multiple_of)]
 #![feature(extract_if)]
 // Configure clippy and other lints
 #![allow(

tests/fail/intrinsics/ptr_offset_from_unsigned_neg.rs

@@ -1,6 +1,4 @@
 //@normalize-stderr-test: "\d+ < \d+" -> "$$ADDR < $$ADDR"
-#![feature(ptr_sub_ptr)]
-
 fn main() {
     let arr = [0u8; 8];
     let ptr1 = arr.as_ptr();

tests/pass/ptr_offset.rs

@@ -1,5 +1,4 @@
 //@compile-flags: -Zmiri-permissive-provenance
-#![feature(ptr_sub_ptr)]
 use std::{mem, ptr};
 
 fn main() {