[FIR-TEST] Add new testdata generated after changes in previous commit

compiler/testData/diagnostics/tests/delegatedProperty/inTrait.fir.kt

@@ -0,0 +1,13 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
+import kotlin.reflect.KProperty
+
+interface T {
+  val a: Int by Delegate()
+}
+
+class Delegate {
+  operator fun getValue(t: Any?, p: KProperty<*>): Int {
+    return 1
+  }
+}