Make Array.size() a function instead of a property

Also add a deprecated extension property to help migration. This is done to
unify getting size of arrays and collections

compiler/testData/diagnostics/tests/incompleteCode/arrayBracketsRange.kt

@@ -4,6 +4,6 @@ fun main(args : Array<String>) {
     var ints : Array<Int?> = arrayOfNulls<Int>(31)
 
     ints[0] = 4; ints[11] = 5; ints[2] =7
-    for(i in 0..ints.size)
+    for(i in 0..ints.size())
         ints[i<!SYNTAX!><!>
 }