Make use of Criterion bench groups

[Serial-ATA]

• Cleaned up the benchmark IDs by removing the "Benchmark" prefix and using snake_case for the method names
• Split the benchmarks into groups based on the crate for easier recognition

For example, BenchmarkLifetime/AddTo is now TURN/Lifetime/add_to.

To make things easier to CTRL-F from Pion, I left the original Go-style names in comments above the benchmarks.

How the index looked before:

How it looks now:

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 61.36%. Comparing base (a74b96d) to head (77797b2).
Report is 6 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #590      +/-   ##
==========================================
- Coverage   61.38%   61.36%   -0.02%     
==========================================
  Files         533      532       -1     
  Lines       49711    49719       +8     
  Branches    12628    12620       -8     
==========================================
- Hits        30513    30508       -5     
- Misses       9856     9868      +12     
- Partials     9342     9343       +1     

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