*: replace sort.Slice with slices.Sort for natural ordering

[rocksload]

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

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 54.79%. Comparing base (7e84819) to head (be2704c).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
cmd/testbeacon.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4054      +/-   ##
==========================================
- Coverage   54.81%   54.79%   -0.03%     
==========================================
  Files         242      242              
  Lines       31040    31038       -2     
==========================================
- Hits        17014    17006       -8     
- Misses      11785    11791       +6     
  Partials     2241     2241              

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