Fix testData/codegen: replace deprecated sort usages.

compiler/testData/codegen/boxWithStdlib/regressions/kt2017.kt

@@ -1,4 +1,4 @@
 fun box(): String {
-    val sorted = arrayListOf("1", "3", "2").sort()
+    val sorted = arrayListOf("1", "3", "2").sorted()
     return if (sorted != arrayListOf("1", "2", "3")) "$sorted" else "OK"
 }

compiler/testData/codegen/boxWithStdlib/regressions/kt6434.kt

@@ -23,6 +23,6 @@ class C(val nums: Map<E, Int>) {
 }
 
 fun box(): String {
-    val res = C(hashMapOf(E.VALUE to 11, E.VALUE2 to 12)).normalizedNums.values().sort().joinToString()
+    val res = C(hashMapOf(E.VALUE to 11, E.VALUE2 to 12)).normalizedNums.values().sorted().joinToString()
     return  if ("0.0, 1.0" == res) "OK" else "fail $res"
 }