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/inference/regressions/kt2324.kt

@@ -25,7 +25,7 @@ fun testSomeFunction() {
 fun assertEquals(<!UNUSED_PARAMETER!>expected<!>: Any?, <!UNUSED_PARAMETER!>actual<!>: Any?, <!UNUSED_PARAMETER!>message<!>: String = "") {
 }
 
-fun arrayList<T>(vararg values: T) : ArrayList<T> = values.toCollection(ArrayList<T>(values.size))
+fun arrayList<T>(vararg values: T) : ArrayList<T> = values.toCollection(ArrayList<T>(values.size()))
 
 fun <T, C: MutableCollection<in T>> Array<T>.toCollection(result: C) : C {
     for (element in this) result.add(element)