Replace all occurrences of WITH_RUNTIME with WITH_STDLIB

We are going to deprecate `WITH_RUNTIME` directive. The main reason
behind this change is that `WITH_STDLIB` directive better describes
its meaning, specifically it will add kotlin stdlib to test's classpath.

compiler/testData/codegen/box/classes/comanionObjectFieldVsClassField.kt

@@ -1,6 +1,6 @@
 // IGNORE_BACKEND: WASM
 // WASM_MUTE_REASON: STDLIB_TEXT
-// WITH_RUNTIME
+// WITH_STDLIB
 
 class Host {
     val ok = "OK"

compiler/testData/codegen/box/classes/initializerBlockDImpl.kt

@@ -1,4 +1,4 @@
-// WITH_RUNTIME
+// WITH_STDLIB
 class World() {
   public val items: ArrayList<Item> = ArrayList<Item>()
 

compiler/testData/codegen/box/classes/interfaceCompanionInitializationWithJava.kt

@@ -1,5 +1,5 @@
 // TARGET_BACKEND: JVM
-// WITH_RUNTIME
+// WITH_STDLIB
 // FILE: CompanionInitialization.java
 
 public class CompanionInitialization {

compiler/testData/codegen/box/classes/kt8011.kt

@@ -1,4 +1,4 @@
-// WITH_RUNTIME
+// WITH_STDLIB
 
 fun testFun1(str: String): String {
     val local = str

compiler/testData/codegen/box/classes/kt940.kt

@@ -1,4 +1,4 @@
-// WITH_RUNTIME
+// WITH_STDLIB
 
 fun box() : String {
     val w = object : Comparator<String?> {

compiler/testData/codegen/box/classes/overloadUnaryOperator.kt

@@ -1,4 +1,4 @@
-// WITH_RUNTIME
+// WITH_STDLIB
 class ArrayWrapper<T>() {
     val contents = ArrayList<T>()