Handle and verify blob transactions in dBFT correctly

[txhsl]

System information

Geth version: 0.5.0-unstable
OS & Version: Linux
Commit hash : f20d5b7

Expected behaviour

This is also a feature imported by #487. Currently, the consensus module can’t handle and verify blocks with blob transactions.

1. AMEV handling. Blob transaction is a new type of transaction that can't be verified with legacy pool, so the preblock construction and verification need to support or ignore it;
2. Blob transaction verification is not working, ref Merge Geth [v1.15.0...v1.15.11] #499 (comment).

Implementation

This should be fixed in #499 or in a separated PR.