sync: update stage bodies validation rules

BodiesStage was meant to check `rule_set_->pre_validate_block_body` to perform a "full body validation", but for optimization reasons the root hash checks were skipped, because they are expensive and are already done in https://github.com/erigontech/silkworm/blob/master/silkworm/sync/internals/body_sequence.cpp#L70-L71 . The remaining checks were performed (pre_validate_transactions, validate_ommers).

Since then `pre_validate_block_body` has grown to include more checks (block.withdrawals, header.withdrawals_root, blob_gas_used).

We need to ensure that these checks are performed either at the time of block consumption in sync, or in BodiesStage.
It would be nice to refactor the code in such a way that future updates to the rules are automatically applied in the BodiesStage.

Note: a header corresponding to the body is not available in sync, but becomes available in the stage.