Add bigint benchmarks

[stress-tess]

Add benchmarks to track performance of bigint operations namely:

• [x] #2139
• [x] #2154
• [x] #2181
• [x] #2191
• [ ] #2206
• [ ] bigint sort benchmark
• [ ] bigint gather benchmark
• [ ] bigint scatter benchmark

[ronawho]

Maybe client<->server transfers as well? (to_ndarray()/ak.array())?

[stress-tess]

Maybe client<->server transfers as well? (to_ndarray()/ak.array())?

Yeah that's a good idea! Added