default -> companion: replace all mentions of default and default object

compiler/testData/loadJava/compiledKotlin/annotations/classMembers/ClassObjectPropertyField.kt

@@ -3,7 +3,7 @@ package test
 annotation class Anno
 
 class Class {
-    default object {
+    companion object {
         [Anno] var property: Int = 42
     }
 }

compiler/testData/loadJava/compiledKotlin/annotations/classMembers/ClassObjectPropertyField.txt

@@ -7,8 +7,8 @@ internal final annotation class Anno : kotlin.Annotation {
 internal final class Class {
     /*primary*/ public constructor Class()
 
-    internal default object Default {
-        /*primary*/ private constructor Default()
+    internal companion object Companion {
+        /*primary*/ private constructor Companion()
         test.Anno() internal final var property: kotlin.Int
             internal final fun <get-property>(): kotlin.Int
             internal final fun <set-property>(/*0*/ <set-?>: kotlin.Int): kotlin.Unit