[FIR] Save declarations in metadata in source order

^KT-54792 Fixed
^KT-54801
^KT-54800

compiler/testData/codegen/box/reflection/properties/propertyOrder.kt

@@ -0,0 +1,49 @@
+// TARGET_BACKEND: JVM_IR
+// WITH_STDLIB
+// WITH_REFLECT
+// FILE: B.java
+public class B {
+    public final int c = 1;
+    public void bb() {}
+    public final int b = 2;
+    public final int a = 10;
+    public void aa() {}
+}
+
+// FILE: main.kt
+import kotlin.reflect.KClass
+import kotlin.reflect.KFunction
+import kotlin.reflect.KProperty
+
+class A {
+    val c = 1
+    fun bb() {}
+    val b = 2
+    val a = 10
+    fun aa() {}
+}
+
+fun listMembers(kClass: KClass<*>): String {
+    return kClass.members.joinToString(" | ") { member ->
+        val prefix = when (member) {
+            is KFunction -> "fun"
+            is KProperty -> "val"
+            else -> "wtf"
+        }
+        "$prefix ${member.name}"
+    }
+}
+
+fun box(): String {
+    val aMembers = listMembers(A::class)
+
+    // After migration of reflection to K2 the order will be following:
+    // "val c | val b | val a | fun bb | fun aa | fun equals | fun hashCode | fun toString"
+    if (aMembers != "val a | val b | val c | fun aa | fun bb | fun equals | fun hashCode | fun toString") return "Fail A: $aMembers"
+
+// Looks like property order is different on different JDK, so it's pointless to test it
+//    val bMembers = listMembers(B::class)
+//    if (bMembers != "fun aa | fun bb | val c | val b | val a | fun equals | fun hashCode | fun toString") return "Fail B: $bMembers"
+
+    return "OK"
+}