Add gas_used to State Test fixtures #1511
Description
Added a comment, but I'm thinking that, to make it easier when debugging the test, we could include the `gas_used` field in the state test fixture.
Potentially here:
https://github.com/ethereum/execution-spec-tests/blob/4891ac729e654ec361d2430960a9b307be125f9a/src/ethereum_test_fixtures/state.py#L86-L94
Originally posted by @marioevz in ethereum/execution-spec-tests#1071 (comment)