implement qps control for benchmark using token bucket algorithm

[artikell]

Implemented a benchmark for constant QPS through token bucket algorithm.

The bench program originally used a lot of CPUs, Control speed through the usleep method, rather than AE events.

refer to #1201

[codecov]

Codecov Report

Attention: Patch coverage is 15.15152% with 28 lines in your changes missing coverage. Please review.

Project coverage is 71.07%. Comparing base (206f7f6) to head (cbca6a5).
Report is 4 commits behind head on unstable.

Files with missing lines	Patch %	Lines
src/valkey-benchmark.c	15.15%	28 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##           unstable    #1761      +/-   ##
============================================
- Coverage     71.14%   71.07%   -0.07%     
============================================
  Files           123      123              
  Lines         65534    65585      +51     
============================================
- Hits          46622    46617       -5     
- Misses        18912    18968      +56     

Files with missing lines	Coverage Δ
src/valkey-benchmark.c	60.50% <15.15%> (-1.25%)	⬇️

... and 19 files with indirect coverage changes