Tune sweat.claim workload to saturate chunk capacity

[aborg-dev]

In #11119 we added sweat.claim workload to Locust load-test setup.

@mooori noted that we would need to adjust the workload to make it more useful.

I suggest we tune it to:

• Make sure we have the settings that can saturate the capacity of the chunk
• Make the workload similar to mainnet traffic

[aborg-dev]

cc #11808

[mooori]

Shortly after the Locust workload was added, sweat-claim was refactored. From what I remember off the top of my head, the current workload might not reflect well what happens in v2 of sweat-claim. This summary and the pointers it contains may be a starting point for analyzing this.