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/decompiler/decompiledText/ClassWithClassObject.expected.kt

@@ -4,7 +4,7 @@
 package test
 
 internal final class ClassWithClassObject() {
-    internal class object {
+    internal default object {
         internal final val a: test.A /* compiled code */
 
         public final var b: test.B /* compiled code */

idea/testData/decompiler/decompiledText/ClassWithClassObject/ClassWithClassObject.kt

@@ -4,7 +4,7 @@ class ClassWithClassObject {
     fun f() {
     }
 
-    class object {
+    default object {
         fun f() {
         }
 

idea/testData/decompiler/decompiledText/DependencyOnNestedClasses/Dependency.kt

@@ -8,7 +8,7 @@ class D {
         class Nested
     }
 
-    class object {
+    default object {
         class NestedInClassObject
     }
 }

idea/testData/decompiler/navigation/decompiled/WithInnerAndObject.kt

@@ -4,7 +4,7 @@
 package testData.libraries
 
 [[public final class WithInnerAndObject() {
-    [[public class object {
+    [[public default object {
         [internal final fun foo(): kotlin.Unit { /* compiled code */ }]
     }]]
 

idea/testData/decompiler/navigation/decompiled/WithTraitClassObject.kt

@@ -4,6 +4,6 @@
 package testData.libraries
 
 [[public final class WithTraitClassObject() {
-    [[public class object : testData.libraries.SimpleTrait {
+    [[public default object : testData.libraries.SimpleTrait {
     }]]
 }]]

idea/testData/decompiler/navigation/library/main.kt

@@ -10,7 +10,7 @@ public class SimpleTraitImpl : SimpleTrait {
 }
 
 public class WithInnerAndObject {
-    class object {
+    default object {
         fun foo() {
         }
     }
@@ -23,7 +23,7 @@ public class WithInnerAndObject {
 }
 
 public class WithTraitClassObject {
-    class object : SimpleTrait
+    default object : SimpleTrait
 }
 
 public abstract class AbstractClass {

idea/testData/decompiler/navigation/usercode/ClassObject.kt

@@ -5,5 +5,5 @@ fun foo() {
 }
 
 // main.kt
-//    class <1>object {
+//    default <1>object {
 //        fun <2>foo() {

idea/testData/decompiler/stubBuilder/Annotations/Annotations.kt

@@ -17,7 +17,7 @@ a public class Annotations private [a] (private [a] val c1: Int, [a] val c2: Int
         [a] private set
 
 
-    private b(E.E2) class object {
+    private b(E.E2) default object {
 
     }
 }

idea/testData/decompiler/stubBuilder/ClassObject/ClassObject.kt

@@ -6,7 +6,7 @@ class ClassObject {
 
     val c = 1
 
-    public class object {
+    public default object {
         val j = 0
         fun z() = 0
 
@@ -20,11 +20,11 @@ class ClassObject {
 
 
     class B {
-        class object {
+        default object {
             class C {
-                class object {
+                default object {
                     class D {
-                        class object {
+                        default object {
                             val i = 3
                             fun f() {
                             }

idea/testData/decompiler/stubBuilder/DependencyOnNestedClasses/Dependency.kt

@@ -8,7 +8,7 @@ class D {
         class Nested
     }
 
-    class object {
+    default object {
         class NestedInClassObject
     }
 }

idea/testData/decompiler/stubBuilder/Enum/Enum.kt

@@ -7,7 +7,7 @@ enum class Enum {
 
     open fun f() = 3
 
-    class object {
+    default object {
         val c: Int = 1
     }
 }