Rollup merge of #82048 - mark-i-m:or-pat-type-ascription, r=petrochenkov

or-patterns: disallow in `let` bindings

~~Blocked on https://github.com/rust-lang/rust/pull/81869~~

Disallows top-level or-patterns before type ascription. We want to reserve this syntactic space for possible future generalized type ascription.

r? ``@petrochenkov``

clippy_lints/src/loops.rs

@@ -885,7 +885,9 @@ struct MinifyingSugg<'a>(Sugg<'a>);
 
 impl<'a> MinifyingSugg<'a> {
     fn as_str(&self) -> &str {
-        let Sugg::NonParen(s) | Sugg::MaybeParen(s) | Sugg::BinOp(_, s) = &self.0;
+        let s = match &self.0 {
+            Sugg::NonParen(s) | Sugg::MaybeParen(s) | Sugg::BinOp(_, s) => s,
+        };
         s.as_ref()
     }