fix: Server-Side diff removed fields missing in diff

[pjiang-dev]

fixes argoproj/argo-cd#23016 a bug that caused removed fields from predictedLive to be added back to predicted live resulting in removal of fields not showing in the diff

[codecov]

Codecov Report

Attention: Patch coverage is 78.57143% with 3 lines in your changes missing coverage. Please review.

Project coverage is 53.71%. Comparing base (8849c3f) to head (da81bd1).
Report is 45 commits behind head on master.

Files with missing lines	Patch %	Lines
pkg/diff/diff.go	78.57%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #722      +/-   ##
==========================================
- Coverage   54.26%   53.71%   -0.56%     
==========================================
  Files          64       64              
  Lines        6164     6486     +322     
==========================================
+ Hits         3345     3484     +139     
- Misses       2549     2728     +179     
- Partials      270      274       +4     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[sonarqubecloud]

Quality Gate passed

Issues
1 New issue
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