refactor: use the built-in max/min to simplify the code

[knowmost]

Summary

In Go 1.21, the standard library includes built-in max/min function, which can greatly simplify the code.

Test Plan

[CLAassistant]

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[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 2 lines in your changes missing coverage. Please review.

Project coverage is 51.86%. Comparing base (34deef2) to head (57a9b3f).
Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
tools/debug/carpenter/main.go	0.00%	1 Missing ⚠️
util/watchdogStreamReader.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #6338   +/-   ##
=======================================
  Coverage   51.85%   51.86%           
=======================================
  Files         653      653           
  Lines       87554    87546    -8     
=======================================
+ Hits        45404    45407    +3     
+ Misses      39276    39264   -12     
- Partials     2874     2875    +1     

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