Replace 'class object' with 'default object' in renderers and test data

Includes changes to decompiled text
Old syntax is used in builtins and project code for now

idea/testData/highlighter/deprecated/ClassObject.kt

@@ -13,13 +13,13 @@ fun test() {
 }
 
 class MyClass(): MyTrait {
-    deprecated("Use A instead") class object {
+    deprecated("Use A instead") default object {
         val test: String = ""
     }
 }
 
 trait MyTrait {
-    deprecated("Use A instead") class object {
+    deprecated("Use A instead") default object {
         val test: String = ""
     }
 }

idea/testData/highlighter/deprecated/Function.kt

@@ -12,7 +12,7 @@ deprecated("Use A instead") fun test4(x: Int, y: Int) { x + y }
 class MyClass() {
     deprecated("Use A instead") fun test2() {}
 
-    class object {
+    default object {
         deprecated("Use A instead") fun test3() {}
     }
 }

idea/testData/highlighter/deprecated/Property.kt

@@ -15,7 +15,7 @@ class MyClass() {
     deprecated("Use A instead") val test2: String = ""
     deprecated("Use A instead") var test5: String = ""
 
-    class object {
+    default object {
          deprecated("Use A instead") val test3: String = ""
          deprecated("Use A instead") var test6: String = ""
     }