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

compiler/testData/codegen/box/closures/captureExtensionReceiverX2.kt

@@ -1,5 +1,7 @@
+fun <T> eval(fn: () -> T) = fn()
+
 fun String.f(x: String): String {
-    fun String.g() = { this@f + this@g }()
+    fun String.g() = eval { this@f + this@g }
     return x.g()
 }