simulation endpoint that retains state

[ape-dev-cs]

This implements two new endpoints in the transaction simulator:

• simulate-stateful-new which instantiates a new instance of an EVM simulation endpoint that can be used multiple times, with each new request simulating an vector of `SimulationRequest``. Returns a simulation id.
• simulate-stateful/{id} which takes the id provided in the URL and applies the array of SimulationRequest to the state of the EVM referred to by the id.

Uses a concurrent hashmap for in-memory EVM storage for max performance.

[devanoneth]

Thanks for the contribution!

[ConnorSB13]

Thanks Mr Ape!

[polyphia]

Amazing !