Allow top-level local delegated properties in scripts

compiler/testData/codegen/script/topLevelLocalDelegatedProperty.kts

@@ -0,0 +1,12 @@
+import kotlin.reflect.KProperty
+
+class Delegate {
+    operator fun getValue(t: Any?, p: KProperty<*>): Int = 3
+}
+
+
+val prop: Int by Delegate()
+
+val  x = prop
+
+// expected: x: 3