Resolve expression in property delegate

compiler/testData/diagnostics/tests/delegatedProperty/thisInDelegate.kt

@@ -0,0 +1,12 @@
+val Int.a by Delegate(<!NO_THIS!>this<!>)
+
+class A {
+  val Int.a by Delegate(<!TYPE_MISMATCH!>this<!>)
+}
+
+class Delegate(i: Int) {
+  fun get(t: Any?, p: String): Int {
+    t.equals(p) // to avoid UNUSED_PARAMETER warning
+    return 1
+  }
+}