Test that the network can handle biased workloads

[SkidanovAlex]

Add a mocknet test that runs the following workloads:

1. Lots of compute-heavy transactions (transactions that do not touch disk, and just run lots of heavy computations);
2. Lots of disk-read-heavy transactions (transactions that read from random locations on a huge state, the state should be at least 30GB of raw data; we might need to upgrade our instances because the actual database might be more than 100GB in this case);
3. Lots of disk-write-heavy transactions (transactions that almost exclusively write to random locations of a huge state);
4. Lots of network-heavy transactions (transactions that barely do anything, but are huge in size, so that all the gas is spent on the actual tx data).

[stale]

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[stale]

This issue has been automatically marked as stale because it has not had recent activity in the last 2 months.
It will be closed in 7 days if no further activity occurs.
Thank you for your contributions.