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/quickfix/autoImports/importInFirstPartInQualifiedExpression.before.data.Sample.kt

@@ -1,7 +1,7 @@
 package some
 
 public class Some {
-  class object {
+  default object {
     public fun test() {
     }
   }

idea/testData/quickfix/createFromUsage/createFunction/call/afterFunOnClassObject.kt

@@ -1,7 +1,7 @@
 // "Create function 'foo'" "true"
 
 class A<T>(val n: T) {
-    class object {
+    default object {
         fun foo(i: Int): Int {
             throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
         }

idea/testData/quickfix/createFromUsage/createFunction/call/beforeFunOnClassObject.kt

@@ -1,7 +1,7 @@
 // "Create function 'foo'" "true"
 
 class A<T>(val n: T) {
-    class object {
+    default object {
 
     }
 }

idea/testData/quickfix/createFromUsage/createVariable/parameter/beforeInAccessorInClassObject.kt

@@ -5,7 +5,7 @@
 // ERROR: Unresolved reference: foo
 
 class A {
-    class object {
+    default object {
         val test: Int get() {
             return <caret>foo
         }

idea/testData/quickfix/createFromUsage/createVariable/parameter/beforeInClassObjectInitializer.kt

@@ -5,7 +5,7 @@
 // ERROR: Unresolved reference: foo
 
 class A {
-    class object {
+    default object {
         {
             val t: Int = <caret>foo
         }

idea/testData/quickfix/createFromUsage/createVariable/parameter/beforeInPropertyInitializerInClassObject.kt

@@ -3,7 +3,7 @@
 // ERROR: Unresolved reference: foo
 
 class A {
-    class object {
+    default object {
         val test: Int = <caret>foo
     }
 }

idea/testData/quickfix/createFromUsage/createVariable/property/afterValOnClassObject.kt

@@ -2,7 +2,7 @@
 // ERROR: Property must be initialized or be abstract
 
 class A<T>(val n: T) {
-    class object {
+    default object {
         val foo: Int
 
     }

idea/testData/quickfix/createFromUsage/createVariable/property/beforeValOnClassObject.kt

@@ -2,7 +2,7 @@
 // ERROR: Property must be initialized or be abstract
 
 class A<T>(val n: T) {
-    class object {
+    default object {
 
     }
 }

idea/testData/quickfix/suppress/declarationKinds/afterClassObject.kt

@@ -1,8 +1,8 @@
-// "Suppress 'REDUNDANT_NULLABLE' for class object Default of C" "true"
+// "Suppress 'REDUNDANT_NULLABLE' for default object Default of C" "true"
 
 class C {
     [suppress("REDUNDANT_NULLABLE")]
-    class object {
+    default object {
         var foo: String?<caret>? = null
     }
 }

idea/testData/quickfix/suppress/declarationKinds/beforeClassObject.kt

@@ -1,7 +1,7 @@
-// "Suppress 'REDUNDANT_NULLABLE' for class object Default of C" "true"
+// "Suppress 'REDUNDANT_NULLABLE' for default object Default of C" "true"
 
 class C {
-    class object {
+    default object {
         var foo: String?<caret>? = null
     }
 }