Rollup merge of #55819 - pnkfelix:issue-55810-must-typeck-pats-eagerly, r=oli-obk

Typecheck patterns of all match arms first, so we get types for bindings

Fix eventually (after backport to beta) the issue #55810

src/test/ui/typeck/issue-55810-must-typeck-match-pats-before-guards.rs

@@ -0,0 +1,23 @@
+// compile-pass
+
+// rust-lang/rust#55810: types for a binding in a match arm can be
+// inferred from arms that come later in the match.
+
+struct S;
+
+impl S {
+    fn method(&self) -> bool {
+        unimplemented!()
+    }
+}
+
+fn get<T>() -> T {
+    unimplemented!()
+}
+
+fn main() {
+    match get() {
+        x if x.method() => {}
+        &S => {}
+    }
+}