Configuration-based microbenchmarks

[Anilm3]

• Support configuration-based multiple scenarios
• Remove context destroy fixture from this particular benchmark. This style of benchmark will be an isolated one which perhaps will take advantage of some of the existing utilities, such as the object generator.
• Add support for cbmf to replace json.
• Perform multiple runs per scenario with different seeds (configurable).
• Remove benchcmp and benchmerge as they will now be redundant.

Future work (to be done in a future PR):

• Reconsider multithreaded tests in order to properly exercise contention, currently only independent fixtures are executed in parallel, but this should be modified to validate the same fixture concurrently. This should also allow for core-pinning of each thread.
• Add memory usage metrics.
• Add more scenarios for each of the operators, transformers, exclusion filters, processors, etc.

Related Jira: APPSEC-10679

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (9f2205c) 83.28% compared to head (a481aa8) 83.28%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #242   +/-   ##
=======================================
  Coverage   83.28%   83.28%           
=======================================
  Files         106      106           
  Lines        4177     4177           
  Branches     1915     1915           
=======================================
  Hits         3479     3479           
  Misses        279      279           
  Partials      419      419           

Flag	Coverage Δ
waf_test_none	83.18% <ø> (ø)
waf_test_sse2	83.25% <ø> (ø)

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[estringana]

The only thing to highlight is that there are some files with bits of code commented. Not sure if that is on purpose or they should get deleted