JVM IR: Handle nested classes in DelegatedPropertyOptimizer

compiler/testData/codegen/box/delegatedProperty/optimizedDelegatedProperties/kt40815_3.kt

@@ -0,0 +1,10 @@
+import kotlin.reflect.KProperty
+
+inline operator fun String.getValue(thiz: Any?, property: KProperty<*>): String = property.name
+
+fun box(): String {
+    class Local {
+        val OK by ""
+    }
+    return Local().OK
+}