Support new form of definitely non-nullable types: T & Any

^KT-26245 In Progress

compiler/testData/codegen/box/notNullAssertions/definitelyNotNullTypes.kt

@@ -17,7 +17,7 @@ public abstract class JClass<T> {
 
 // FILE: main.kt
 class KDerived<E> : JClass<E>() {
-    override fun foo(e: E!!) {
+    override fun foo(e: E & Any) {
         throw RuntimeException("Should not be called")
     }
 }