DescriptorRendererImpl now writes 'inner' for inner classes

#KT-1174 In Progress

compiler/testData/loadKotlin/class/ClassInnerClass.kt

@@ -1,6 +1,6 @@
 package test
 
 class Outer {
-    class Inner {
+    inner class Inner {
     }
 }

compiler/testData/loadKotlin/class/ClassInnerClass.txt

@@ -3,7 +3,7 @@ package test
 internal final class Outer {
     /*primary*/ public constructor Outer()
     
-    internal final class Inner {
+    internal final inner class Inner {
         /*primary*/ public constructor Inner()
     }
 }

compiler/testData/loadKotlin/class/InnerClassExtendInnerClass.kt

@@ -1,7 +1,7 @@
 package test
 
 class Outer() {
-    open class Inner1()
+    open inner class Inner1()
     
-    class Inner2() : Inner1()
+    inner class Inner2() : Inner1()
 }

compiler/testData/loadKotlin/class/InnerClassExtendInnerClass.txt

@@ -3,11 +3,11 @@ package test
 internal final class Outer {
     /*primary*/ public constructor Outer()
     
-    internal open class Inner1 {
+    internal open inner class Inner1 {
         /*primary*/ public constructor Inner1()
     }
     
-    internal final class Inner2 : test.Outer.Inner1 {
+    internal final inner class Inner2 : test.Outer.Inner1 {
         /*primary*/ public constructor Inner2()
     }
 }

compiler/testData/loadKotlin/class/NestedClass.kt

@@ -1,5 +1,5 @@
 package test
 
 class Outer() {
-    class Inner()
+    class Nested()
 }

compiler/testData/loadKotlin/class/NestedClass.txt

@@ -3,7 +3,7 @@ package test
 internal final class Outer {
     /*primary*/ public constructor Outer()
     
-    internal final class Inner {
-        /*primary*/ public constructor Inner()
+    internal final class Nested {
+        /*primary*/ public constructor Nested()
     }
 }