[SPEC]: Benchmark client session in RESP3 protocol mode

[filipecosta90]

• redis-benchmark supports it: via -3 parameter
• memtier_benchmark link to github issue: via --resp parameter

The goal is that anyone using our client runner will be able to pass:
redis-benchmarks-spec-client-runner --resp 3 .... and run the tests he wants.

[filipecosta90]

cc @ofekshenawa

[filipecosta90]

Fixed by #169