Consider generating RPC tests

Consider generating tests for RPC endpoints like the ones generated here: https://github.com/ethereum/execution-apis/tree/main/tests

The main advantage of generating these tests here too is that we can reuse many of the state test scenarios and all the EEST machinery to generate the tests, and these can be developed in parallel to state tests so it will be much less likely that we forget to add them later to execution-apis.

I know this is going to be contentious, so I will be creating the issue just to explore the possibility of this.