Block value calculation may be incorrect in getPayloadV2

[siladu]

Some WIP hive tests have picked up an issue...

Besu is returning value, e.g. in one of the blocks, of 54089155500000000, but the expected value by the test (and returned by other clients) is 6224737500000000, which 8 times lower, and this is because, during the calculation, the "cumulative gas used" of the transaction is used to get the fee, instead of the "gas used"
If i swap the "gas used" by "cumulative gas used" while computing the expected value in the test, I get the exact same value as Besu