Reflection: add KClass.{supertypes,superclasses,allSupertypes,allSuperclasses}

Some things are not implemented yet for allSupertypes, such as KType->Type
mapping of types and generic substitution of built-in types

compiler/testData/codegen/box/reflection/mapping/types/supertypes.kt

@@ -0,0 +1,31 @@
+// WITH_REFLECT
+// FULL_JDK
+
+import java.lang.reflect.ParameterizedType
+import java.lang.reflect.TypeVariable
+import kotlin.reflect.jvm.javaType
+import kotlin.test.assertEquals
+import kotlin.test.assertTrue
+import kotlin.test.fail
+
+open class Klass
+interface Interface<T, U>
+interface Interface2
+
+class A<Z> : Interface<String, Z>, Klass(), Interface2
+
+fun box(): String {
+    val (i, k, i2) = A::class.supertypes.map { it.javaType }
+
+    i as? ParameterizedType ?: fail("Not a parameterized type: $i")
+    assertEquals(Interface::class.java, i.rawType)
+    val args = i.actualTypeArguments
+    assertEquals(String::class.java, args[0], "Not String: ${args[0]}")
+    assertTrue(args[1].let { it is TypeVariable<*> && it.name == "Z" && it.genericDeclaration == A::class.java }, "Not Z: ${args[1]}")
+
+    assertEquals(Klass::class.java, k)
+
+    assertEquals(Interface2::class.java, i2)
+
+    return "OK"
+}