JVM_IR KT-45103 optimize direct invoke for lambdas and callable refs

compiler/testData/codegen/box/directInvokeOptimization/unboundInnerContructorRef.kt

@@ -0,0 +1,12 @@
+// CHECK_BYTECODE_TEXT
+// JVM_IR_TEMPLATES
+// 0 Function(^.)*.invoke
+
+class Outer (val x: String) {
+    inner class Inner(val y: String) {
+        val yx = y + x
+    }
+}
+
+fun box() =
+    (Outer::Inner).invoke(Outer("K"), "O").yx