tools: implement the pd-region-bench tool

[JmPotato]

What problem does this PR solve?

Issue Number: ref #8690.

What is changed and how does it work?

Implement the pd-region-bench tool.

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)

Release note

None.

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[codecov]

Codecov Report

Attention: Patch coverage is 0% with 254 lines in your changes missing coverage. Please review.

Project coverage is 76.00%. Comparing base (2bbeb9c) to head (92d220d).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #9087      +/-   ##
==========================================
- Coverage   76.25%   76.00%   -0.26%     
==========================================
  Files         468      469       +1     
  Lines       71695    71949     +254     
==========================================
+ Hits        54673    54684      +11     
- Misses      13610    13857     +247     
+ Partials     3412     3408       -4     

Flag	Coverage Δ
unittests	76.00% <0.00%> (-0.26%)	⬇️

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