* Add a block production benchmark
* Simplify the block production benchmark
* Cleanups; switch execution strategy to WASM
* Switch WASM execution to `Compiled`
* Reduce the setup cost of the benchmark
Creating all of those extrinsics takes up *a lot* of time, up to the point
where the majority of the time is actually spent *outside* of the code
which we want to benchmark here. So let's only do it once.
* Add a variant of the block production benchmark with proof recording
Arkadiy Paronyan