Introduce additional API for introspecting functions

memberFunctions, declaredMemberFunctions, staticFunctions, etc.

 #KT-8797 Fixed

compiler/testData/codegen/boxWithJava/reflection/declaredVsInheritedFunctions/J.java

@@ -0,0 +1,6 @@
+public class J {
+    public void publicMemberJ() {}
+    private void privateMemberJ() {}
+    public static void publicStaticJ() {}
+    private static void privateStaticJ() {}
+}