[Tests] Use stable order for ir/kotlinLike dumps

^KT-65406

compiler/testData/ir/irText/expressions/lambdaInCAO.fir.kt.txt

@@ -1,10 +1,10 @@
-operator fun Any.plusAssign(lambda: Function0<Unit>) {
-}
-
 operator fun Any.get(index: Function0<Unit>): Int {
   return 42
 }
 
+operator fun Any.plusAssign(lambda: Function0<Unit>) {
+}
+
 operator fun Any.set(index: Function0<Unit>, value: Int) {
 }
 
@@ -36,3 +36,4 @@ fun test3(a: Any) {
   tmp_2.set(index = tmp_3, value = tmp_4.inc())
   tmp_4 /*~> Unit */
 }
+