*: use maps.Copy for cleaner map handling

[minxinyi]

There is a new function added in the go1.21 standard library, which can make the code more concise and easy to read.

category: refactor
ticket: none

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 54.57%. Comparing base (144db5b) to head (227b773).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3856      +/-   ##
==========================================
+ Coverage   54.54%   54.57%   +0.02%     
==========================================
  Files         227      227              
  Lines       36409    36404       -5     
==========================================
+ Hits        19860    19866       +6     
+ Misses      14449    14438      -11     
  Partials     2100     2100              

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