replace 'trait' keyword with 'interface' in user-visible messages and code generation tools

compiler/testData/loadJava/compiledKotlin/classObject/ClassObjectExtendsTrait.txt

@@ -1,6 +1,6 @@
 package test
 
-internal trait Bbb {
+internal interface Bbb {
 }
 
 internal final class ClassObjectextendsTrait {

compiler/testData/loadJava/compiledKotlin/classObject/ClassObjectExtendsTraitWithTP.txt

@@ -1,6 +1,6 @@
 package test
 
-internal trait Bbb</*0*/ P> {
+internal interface Bbb</*0*/ P> {
 }
 
 internal final class ClassObjectExtendsTraitWithTP {

compiler/testData/loadJava/compiledKotlin/classObject/Delegation.txt

@@ -10,6 +10,6 @@ internal final class A : test.T {
     }
 }
 
-internal trait T {
+internal interface T {
     internal abstract fun foo(): kotlin.Int
 }

compiler/testData/loadJava/compiledKotlin/classObject/classObjectInTraitStaticFields.txt

@@ -1,6 +1,6 @@
 package test
 
-internal trait Test {
+internal interface Test {
 
     internal companion object Companion {
         /*primary*/ private constructor Companion()