Change VerkleSpecTests to also do rollback of state

[lu-pinto]

Currently verkle spec tests are only doing rollforward by implementing state change from transaction in test but we should also test rollback of state similar to https://github.com/hyperledger/besu/blob/verkle/ethereum/referencetests/src/main/java/org/hyperledger/besu/ethereum/referencetests/BonsaiReferenceTestWorldState.java#L114-L125

The most challenging here is the fact that VerlkleSpecTests are running the same as BlockchainReferenceTests and this rollback testing is done in GeneralReferenceTests which have very different initialisation code paths.