Introduce propertyDelegated method in delegates

compiler/testData/codegen/box/delegatedProperty/propertyDelegatedMethod/twoPropsByOneDelegate.kt

@@ -0,0 +1,14 @@
+class Delegate {
+    var count = 0
+    fun get(t: Any?, p: PropertyMetadata) {}
+    fun propertyDelegated(vararg p: PropertyMetadata) { count++ }
+}
+
+val delegate = Delegate()
+
+val prop1 by delegate
+val prop2 by delegate
+
+fun box(): String {
+    return if(delegate.count == 2) "OK" else "fail"
+}