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/copyPaste/imports/AlreadyImportedViaStar.kt

@@ -40,7 +40,7 @@ class Outer {
 }
 
 class ClassObject {
-    class object {
+    default object {
     }
 }
 

idea/testData/copyPaste/imports/ClassObject.kt

@@ -3,12 +3,12 @@ package a
 trait T
 
 class A {
-    class object: T {
+    default object: T {
     }
 }
 
 class B {
-    class object {
+    default object {
         fun f(): Int
     }
 }

idea/testData/copyPaste/imports/ClassObjectFunInsideClass.kt

@@ -7,7 +7,7 @@ class A {
         f()
     }</selection>
 
-    class object {
+    default object {
         fun f()
     }
 }

idea/testData/copyPaste/imports/ClassObjectInner.kt

@@ -7,7 +7,7 @@ import a.Outer.Default.NestedTrait
 import a.Outer.Default.NestedAnnotation
 
 class Outer {
-    class object {
+    default object {
         class Nested {
         }
         enum class NestedEnum {

idea/testData/copyPaste/imports/ClassResolvedToPackage.kt

@@ -1,7 +1,7 @@
 package a
 
 class a {
-    class object {
+    default object {
     }
 }
 

idea/testData/copyPaste/imports/ImportDependency.dependency.kt

@@ -37,6 +37,6 @@ class Outer {
 }
 
 class ClassObject {
-    class object {
+    default object {
     }
 }

idea/testData/copyPaste/imports/KotlinLibrary/Dependency.kt

@@ -38,6 +38,6 @@ class Outer {
 }
 
 class ClassObject {
-    class object {
+    default object {
     }
 }

idea/testData/copyPaste/imports/NoImportForSamePackage.kt

@@ -40,7 +40,7 @@ class Outer {
 }
 
 class ClassObject {
-    class object {
+    default object {
     }
 }
 

idea/testData/copyPaste/imports/ReferencedElementAlsoCopied.expected.kt

@@ -19,7 +19,7 @@ object O2 {
 }
 
 class ClassObject {
-    class object {
+    default object {
     }
 }
 

idea/testData/copyPaste/imports/ReferencedElementAlsoCopied.kt

@@ -19,7 +19,7 @@ object O2 {
 }
 
 class ClassObject {
-    class object {
+    default object {
     }
 }