Auto merge of #147957 - matthiaskrgr:rollup-aqt593u, r=matthiaskrgr

Rollup of 7 pull requests

Successful merges:

 - rust-lang/rust#141445 (Add `FromIterator` impls for `ascii::Char`s to `String`s)
 - rust-lang/rust#142339 (Add NonNull pattern types)
 - rust-lang/rust#147768 (Code refactoring on hir report_no_match_method_error)
 - rust-lang/rust#147788 (const Cell methods)
 - rust-lang/rust#147932 (Create UTF-8 version of `OsStr`/`OsString`)
 - rust-lang/rust#147933 (os_str: Make platform docs more consistent)
 - rust-lang/rust#147948 (PassWrapper: Access GlobalValueSummaryInfo::SummaryList via getter for LLVM 22+)

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

Author: bors

tests/pass/pattern-types.rs

@@ -0,0 +1,18 @@
+#![feature(pattern_types, pattern_type_macro, sized_hierarchy)]
+#![allow(dead_code)]
+
+use std::marker::PointeeSized;
+use std::mem::transmute;
+
+pub struct NonNull<T: PointeeSized> {
+    pointer: std::pat::pattern_type!(*const T is !null),
+}
+
+trait Trait {}
+impl Trait for () {}
+
+fn main() {
+    unsafe {
+        let _: NonNull<dyn Trait> = NonNull { pointer: transmute(&mut () as *mut dyn Trait) };
+    }
+}