Support KCallable.callBy with map of parameters to arguments

callBy is able to handle optional parameters.

 #KT-8827 Fixed

compiler/testData/codegen/boxWithStdlib/reflection/callBy/privateMemberFunction.kt

@@ -0,0 +1,27 @@
+import kotlin.reflect.IllegalCallableAccessException
+import kotlin.reflect.jvm.isAccessible
+
+class A {
+    private fun foo(default: Any? = this) {
+    }
+
+    fun f() = A::foo
+}
+
+fun box(): String {
+    val a = A()
+    val f = a.f()
+
+    try {
+        f.callBy(mapOf(f.parameters.first() to a))
+        return "Fail: IllegalCallableAccessException should have been thrown"
+    }
+    catch (e: IllegalCallableAccessException) {
+        // OK
+    }
+
+    f.isAccessible = true
+    f.callBy(mapOf(f.parameters.first() to a))
+
+    return "OK"
+}