[Tests] Use stable order for ir/kotlinLike dumps

^KT-65406

compiler/testData/ir/irText/classes/privateInterface.kt.txt

@@ -1,24 +1,3 @@
-private interface I {
-  abstract fun fooString(): String
-
-  fun barString(): String {
-    return "bar@I"
-  }
-
-  fun bazString(): String {
-    return "baz@I"
-  }
-
-  abstract fun fooUnit()
-
-  fun barUnit() {
-  }
-
-  fun bazUnit() {
-  }
-
-}
-
 open class C1 : I {
   constructor() /* primary */ {
     super/*Any*/()
@@ -26,18 +5,18 @@ open class C1 : I {
 
   }
 
-  override fun fooString(): String {
-    return "foo@C1"
-  }
-
   override fun barString(): String {
     return "bar@C1"
   }
 
-  override fun fooUnit() {
+  override fun barUnit() {
   }
 
-  override fun barUnit() {
+  override fun fooString(): String {
+    return "foo@C1"
+  }
+
+  override fun fooUnit() {
   }
 
 }
@@ -51,3 +30,24 @@ class C2 : C1 {
 
 }
 
+private interface I {
+  fun barString(): String {
+    return "bar@I"
+  }
+
+  fun barUnit() {
+  }
+
+  fun bazString(): String {
+    return "baz@I"
+  }
+
+  fun bazUnit() {
+  }
+
+  abstract fun fooString(): String
+
+  abstract fun fooUnit()
+
+}
+