[simulation] Optimizations

The simulation runtime is getting a little long so this makes a few optimizations that should together cut runtime in about half:

1. Swap tests check each pool to and from one other random one instead of pools/2.
2. Savers actors run in parallel.
3. Decrease native mocknet Thornode block time from 5 to 2 seconds.
4. Deploy mocknet EVM contracts in parallel.
5. Reduce Bifrost init retry interval.
6. (not perf related) Log the operation function name on failures.