K2: expand types during smartcasting to prevent redundant intersections

#KT-53184 Fixed

compiler/testData/codegen/box/fir/getOnNullableTypeAlias.kt

@@ -0,0 +1,18 @@
+// TARGET_BACKEND: JVM_IR
+// WITH_REFLECT
+
+import kotlin.reflect.KProperty1
+
+private typealias PropAlias<T> = KProperty1<T, Any?>?
+
+fun box(): String {
+    val backRefProp: PropAlias<Foo> = Foo::bar
+    if (backRefProp != null) {
+        return backRefProp.get(Foo()) as String
+    }
+    return "FAIL"
+}
+
+class Foo {
+    val bar: String = "OK"
+}