Auto merge of #137571 - tgross35:rollup-i1tcnv1, r=tgross35

Rollup of 8 pull requests

Successful merges:

 - #134655 (Stabilize `hash_extract_if`)
 - #135933 (Explain how Vec::with_capacity is faithful)
 - #136668 (Stabilize `core::str::from_utf8_mut` as `const`)
 - #136775 (Update `String::from_raw_parts` safety requirements)
 - #137109 (stabilize extract_if)
 - #137349 (Implement `read_buf` for zkVM stdin)
 - #137493 (configure.py: don't instruct user to run nonexistent program)
 - #137516 (remove some unnecessary rustc_const_unstable)

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

Author: bors

src/lib.rs

@@ -15,7 +15,6 @@
 #![feature(unqualified_local_imports)]
 #![feature(derive_coerce_pointee)]
 #![feature(arbitrary_self_types)]
-#![feature(extract_if)]
 // Configure clippy and other lints
 #![allow(
     clippy::collapsible_else_if,