Implement pricing for EIP-4844 blob transactions

[mempirate]

Context

Our current pricing strategy only considers execution gas used, which for blob transactions may not accurately reflect the actual price. If tx A and tx B both pay a 3 gwei execution priority fee (and both consume 21k execution gas), but tx A has 1 blob and tx B has 6, those should be priced differently, because if the proposer commits to tx B, it cannot commit any other blob transactions (because max blobs per block has been hit). Therefore, I think the algorithm should incorporate the blob gas used / max blob gas.