[DRAFT] chore: benchmark tests

[daniel-sanche]

WIP, blocked on test proxy: #836

This PR adds simple benchmark tests. The main goal currently is for performance profiling, to detect bottlenecks during development. In the future, we can extend this system to get more objective performance metrics, and to
run cross-language benchmarks, to test functionality against existing clients.

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Implementation

Benchmarks are implemented in tests/benchmarks/benchmarks.py, which define client and server logic to test as part of the benchmark.

tests/benchmarks/test_benchmarks.py is a pytest file that will drive the benchmarks on both the v3 client and the v3 client, and report timing results.

Running python -m pytest test_benchmarks.py --profile will include a profile trace for each failed benchmark, which can be read through the CLI or visualized in snakeviz to find bottlenecks in the code. We can use this to optimize our code.