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/debugger/tinyApp/outs/frameClassObject.out

@@ -11,7 +11,7 @@ fun main(args: Array<String>) {
 }
 
 class A {
-    class object {
+    default object {
         val prop = 1
         fun myFun() = 1
     }

idea/testData/debugger/tinyApp/src/evaluate/singleBreakpoint/classObjectVal.kt

@@ -10,7 +10,7 @@ class MyClass {
         val a = 1
     }
 
-    class object {
+    default object {
         val coProp = 1
     }
 }

idea/testData/debugger/tinyApp/src/evaluate/singleBreakpoint/dependentOnFile.kt

@@ -8,7 +8,7 @@ fun main(args: Array<String>) {
 class TestClass {
     fun testFun() = 1
 
-    class object {
+    default object {
         val p = 1
     }
 }

idea/testData/debugger/tinyApp/src/evaluate/singleBreakpoint/frame/frameClassObject.kt

@@ -5,7 +5,7 @@ fun main(args: Array<String>) {
 }
 
 class A {
-    class object {
+    default object {
         val prop = 1
         fun myFun() = 1
     }

idea/testData/debugger/tinyApp/src/stepInto/stepInto/accessors.kt

@@ -12,7 +12,7 @@ class A {
         prop = 2
     }
 
-    class object {
+    default object {
         private fun foo() {
             val a = 1
         }

idea/testData/debugger/tinyApp/src/stepInto/stepInto/syntheticMethods.kt

@@ -31,7 +31,7 @@ class A {
         f()
     }
 
-    class object {
+    default object {
         fun test() {
             lambda {
                 val a = 1

idea/testData/debugger/tinyApp/src/stepInto/stepIntoAndSmartStepInto/classObjectFunFromClass.kt

@@ -6,7 +6,7 @@ class A {
         foo()
     }
 
-    class object {
+    default object {
         fun foo() {
             val a = 1
         }

idea/testData/debugger/tinyApp/src/stepInto/stepIntoAndSmartStepInto/classObjectFunFromTopLevel.kt

@@ -1,7 +1,7 @@
 package classObjectFunFromTopLevel
 
 class A {
-    class object {
+    default object {
         fun bar() {
             val a = 1
         }