FIR: introduce & use various comparators to sort members while de/serialization

#KT-41018 fixed

compiler/fir/analysis-tests/testData/loadCompiledKotlin/classObject/InnerClassInClassObject.txt

@@ -1,6 +1,4 @@
 public final class TestFirst : R|kotlin/Any| {
-    public constructor(): R|test/TestFirst|
-
     public final companion object Companion : R|kotlin/Any| {
         public final fun testing(a: R|test/TestFirst.InnerClass|): R|kotlin/Int|
 
@@ -20,4 +18,6 @@ public final class TestFirst : R|kotlin/Any| {
 
     }
 
+    public constructor(): R|test/TestFirst|
+
 }