Auto merge of #87195 - yaahc:move-assert_matches-again, r=oli-obk

rename assert_matches module

Fixes nightly breakage introduced in https://github.com/rust-lang/rust/pull/86947

compiler/rustc_mir/src/interpret/memory.rs

@@ -6,7 +6,7 @@
 //! integer. It is crucial that these operations call `check_align` *before*
 //! short-circuiting the empty case!
 
-use std::assert::assert_matches;
+use std::assert_matches::assert_matches;
 use std::borrow::Cow;
 use std::collections::VecDeque;
 use std::convert::{TryFrom, TryInto};