Rollup merge of #133558 - compiler-errors:structurally-resolve-probe-adt, r=lcnr

Structurally resolve in `probe_adt`

fixes #132320

r? lcnr

tests/ui/traits/next-solver/typeck/structurally-resolve-in-probe_adt.rs

@@ -0,0 +1,15 @@
+//@ check-pass
+//@ compile-flags: -Znext-solver
+
+trait Mirror {
+    type Assoc;
+}
+impl<T> Mirror for T {
+    type Assoc = T;
+}
+
+type Foo<T> = <Option<T> as Mirror>::Assoc;
+
+fn main() {
+    let x = Foo::<i32>::None;
+}