UpstreamServer Fields Logs Displayed as Memory Addresses

[AlexFenlon]

Proposed changes

• Fixes memory address showing up in log line
• Add struct field names to log line for clarity.

log line before the fix:

I20241009 15:30:00.204220   1 manager.go:412] Updated servers of vs_default_cafe_coffee; Added: [{0xc000d91928 0xc000d91920 <nil> <nil> <nil> 10.244.0.5:8080 10s    0 false}], Removed: [], Updated: []

log line after the fix:

I20241010 10:28:57.889534   1 manager.go:416] Updated servers of vs_default_cafe_coffee; Added: [{MaxConns:0 MaxFails:1 Backup:false Down:false Weight:0 Server:10.244.0.5:8080 FailTimeout:10s SlowStart: Route: Service: ID:0 Drain:false}], Removed: [], Updated: []

Resolves: #6634

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto main
• I will ensure my PR is targeting the main branch and pulling from my branch from my own fork

[codecov]

Codecov Report

Attention: Patch coverage is 78.94737% with 4 lines in your changes missing coverage. Please review.

Project coverage is 53.30%. Comparing base (e7e1757) to head (4288f93).
Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
internal/nginx/manager.go	78.94%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6635      +/-   ##
==========================================
+ Coverage   53.26%   53.30%   +0.03%     
==========================================
  Files          87       87              
  Lines       16257    16277      +20     
==========================================
+ Hits         8660     8677      +17     
- Misses       7182     7185       +3     
  Partials      415      415              

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