[TEST] Get gas cost via RPC

[pefontana]

• To ensure we get the same state after a block execution we need to take into account the gas. We need to make some modifications in blockifier and replay crates.
  • Get the gas cost of the tx via RPC in the starknet replay crate
  • Pass this gas cost to blockifier and pass it
  • charge this cost in the tx
    NOTE: These changes should be in a separate branch, since is not a modification we want to have in production