Make Array.indices extension property, move to stdlib

This is not something that needs to be intrinsified. Note that compiler
optimizations are still possible and the fact whether 'indices' is a member or
an extension is irrelevant to the optimizer

compiler/testData/builtin-classes.txt

@@ -15,8 +15,6 @@ public open class Any {
 
 public final class Array</*0*/ reified T> : kotlin.Cloneable {
     /*primary*/ public constructor Array</*0*/ reified T>(/*0*/ size: kotlin.Int, /*1*/ init: kotlin.Function1<kotlin.Int, T>)
-    public final val indices: kotlin.IntRange
-        public final fun <get-indices>(): kotlin.IntRange
     public open override /*1*/ fun clone(): kotlin.Array<T>
     public final fun get(/*0*/ index: kotlin.Int): T
     public final fun iterator(): kotlin.Iterator<T>
@@ -35,8 +33,6 @@ public final class Boolean : kotlin.Comparable<kotlin.Boolean> {
 
 public final class BooleanArray : kotlin.Cloneable {
     /*primary*/ public constructor BooleanArray(/*0*/ size: kotlin.Int)
-    public final val indices: kotlin.IntRange
-        public final fun <get-indices>(): kotlin.IntRange
     public open override /*1*/ fun clone(): kotlin.BooleanArray
     public final fun get(/*0*/ index: kotlin.Int): kotlin.Boolean
     public final fun iterator(): kotlin.BooleanIterator
@@ -117,8 +113,6 @@ public final class Byte : kotlin.Number, kotlin.Comparable<kotlin.Byte> {
 
 public final class ByteArray : kotlin.Cloneable {
     /*primary*/ public constructor ByteArray(/*0*/ size: kotlin.Int)
-    public final val indices: kotlin.IntRange
-        public final fun <get-indices>(): kotlin.IntRange
     public open override /*1*/ fun clone(): kotlin.ByteArray
     public final fun get(/*0*/ index: kotlin.Int): kotlin.Byte
     public final fun iterator(): kotlin.ByteIterator
@@ -237,8 +231,6 @@ public final class Char : kotlin.Comparable<kotlin.Char> {
 
 public final class CharArray : kotlin.Cloneable {
     /*primary*/ public constructor CharArray(/*0*/ size: kotlin.Int)
-    public final val indices: kotlin.IntRange
-        public final fun <get-indices>(): kotlin.IntRange
     public open override /*1*/ fun clone(): kotlin.CharArray
     public final fun get(/*0*/ index: kotlin.Int): kotlin.Char
     public final fun iterator(): kotlin.CharIterator
@@ -388,8 +380,6 @@ public final class Double : kotlin.Number, kotlin.Comparable<kotlin.Double> {
 
 public final class DoubleArray : kotlin.Cloneable {
     /*primary*/ public constructor DoubleArray(/*0*/ size: kotlin.Int)
-    public final val indices: kotlin.IntRange
-        public final fun <get-indices>(): kotlin.IntRange
     public open override /*1*/ fun clone(): kotlin.DoubleArray
     public final fun get(/*0*/ index: kotlin.Int): kotlin.Double
     public final fun iterator(): kotlin.DoubleIterator
@@ -614,8 +604,6 @@ public final class Float : kotlin.Number, kotlin.Comparable<kotlin.Float> {
 
 public final class FloatArray : kotlin.Cloneable {
     /*primary*/ public constructor FloatArray(/*0*/ size: kotlin.Int)
-    public final val indices: kotlin.IntRange
-        public final fun <get-indices>(): kotlin.IntRange
     public open override /*1*/ fun clone(): kotlin.FloatArray
     public final fun get(/*0*/ index: kotlin.Int): kotlin.Float
     public final fun iterator(): kotlin.FloatIterator
@@ -918,8 +906,6 @@ public final class Int : kotlin.Number, kotlin.Comparable<kotlin.Int> {
 
 public final class IntArray : kotlin.Cloneable {
     /*primary*/ public constructor IntArray(/*0*/ size: kotlin.Int)
-    public final val indices: kotlin.IntRange
-        public final fun <get-indices>(): kotlin.IntRange
     public open override /*1*/ fun clone(): kotlin.IntArray
     public final fun get(/*0*/ index: kotlin.Int): kotlin.Int
     public final fun iterator(): kotlin.IntIterator
@@ -1087,8 +1073,6 @@ public final class Long : kotlin.Number, kotlin.Comparable<kotlin.Long> {
 
 public final class LongArray : kotlin.Cloneable {
     /*primary*/ public constructor LongArray(/*0*/ size: kotlin.Int)
-    public final val indices: kotlin.IntRange
-        public final fun <get-indices>(): kotlin.IntRange
     public open override /*1*/ fun clone(): kotlin.LongArray
     public final fun get(/*0*/ index: kotlin.Int): kotlin.Long
     public final fun iterator(): kotlin.LongIterator
@@ -1381,8 +1365,6 @@ public final class Short : kotlin.Number, kotlin.Comparable<kotlin.Short> {
 
 public final class ShortArray : kotlin.Cloneable {
     /*primary*/ public constructor ShortArray(/*0*/ size: kotlin.Int)
-    public final val indices: kotlin.IntRange
-        public final fun <get-indices>(): kotlin.IntRange
     public open override /*1*/ fun clone(): kotlin.ShortArray
     public final fun get(/*0*/ index: kotlin.Int): kotlin.Short
     public final fun iterator(): kotlin.ShortIterator