KT-13440 Bound callable references in reflection

compiler/testData/codegen/box/reflection/callBy/boundExtensionFunction.kt

@@ -0,0 +1,13 @@
+// TODO: muted automatically, investigate should it be ran for JS or not
+// IGNORE_BACKEND: JS
+
+// WITH_REFLECT
+
+import kotlin.test.assertEquals
+
+fun String.extFun(k: String, s: String = "") = this + k + s
+
+fun box(): String {
+    val sExtFun = "O"::extFun
+    return sExtFun.callBy(mapOf(sExtFun.parameters[0] to "K"))
+}