* `ExecutionsRequest` from light-clients as read-only
This changes so all `ExecutionRequests` from light-clients are executed
as read-only which the `virtual``flag == true ensures.
This boost up the current transaction to always succeed
Note, this only affects `eth_estimateGas` and `eth_call` AFAIK.
* grumbles(revert renaming) : TransactionProof
* grumbles(trace) : remove incorrect trace
* grumbles(state/prove_tx) : explicit `virt`
Remove the boolean flag to determine that a `state::prove_transaction`
whether it should be executed in a virtual context or not.
Because of that also rename the function to
`state::prove_transction_virtual` to make more clear
5b54442a48