Add authority benchmarks

[zjb0807]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 53.60%. Comparing base (4799169) to head (b13c1fc).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
authority/src/benchmarking.rs	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1041      +/-   ##
==========================================
+ Coverage   53.55%   53.60%   +0.04%     
==========================================
  Files          52       53       +1     
  Lines        3669     3666       -3     
==========================================
  Hits         1965     1965              
+ Misses       1704     1701       -3     

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