Add PoA middleware dynamic checking [APE-838]

[NotPeopling2day]

In the connect we need to add PoA dynamic checking:

       def check_poa(block_id) -> bool:
            try:
                block = self.web3.eth.get_block(block_id)
            except ExtraDataLengthError:
                return True
            else:
                return (
                    "proofOfAuthorityData" in block
                    or len(block.get("extraData", "")) > MAX_EXTRADATA_LENGTH
                )

      # Handle if using PoA
      if any(map(check_poa, (0, "latest"))):
          self._web3.middleware_onion.inject(geth_poa_middleware, layer=0)