[tests] Cannot return collection-typed values from scripts

[SupunS]

Crashes when trying to return an array/dictionary/composite typed value from a script.

import Test

pub fun test() {
    var blockchain = Test.newEmulatorBlockchain()
    var result = blockchain.executeScript("pub fun main(): [UInt64] { return [1, 2, 3]}", [])

Root cause: Storage is not properly initialized