Implement KClass.getProperties()

#KT-6570 In Progress

compiler/testData/codegen/boxWithStdlib/reflection/properties/simpleGetProperties.kt

@@ -0,0 +1,23 @@
+import kotlin.reflect.jvm.kotlin
+
+class A(param: String) {
+    val int: Int get() = 42
+    val string: String = param
+    var anyVar: Any? = null
+
+    val List<IntRange>.extensionToList: Unit get() {}
+
+    fun notAProperty() {}
+}
+
+fun box(): String {
+    val klass = javaClass<A>().kotlin
+
+    val props = klass.getProperties()
+
+    val names = props.map { it.name }.toSortedList()
+    assert(names == listOf("anyVar", "int", "string")) { "Fail names: $props" }
+
+    val stringProp = props.firstOrNull { it.name == "string" } ?: return "Fail, string not found: $props"
+    return stringProp.get(A("OK")) as String
+}