fix: New kube applier for server side diff dry run with refactoring (#21488)

[andrii-korotkov-verkada]

Fixes: #21488

Use the new kube applier from gitops engine, which avoid the error arising from concatenating kube command stderr to stdout.

Needs to be cherry-picked to v2.14, but need a manual PR due to referencing v3 vs v2.

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[codecov]

Codecov Report

Attention: Patch coverage is 33.33333% with 16 lines in your changes missing coverage. Please review.

Project coverage is 55.65%. Comparing base (922dd77) to head (c2058dc).
Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
util/kube/kubectl.go	10.00%	9 Missing ⚠️
controller/state.go	25.00%	3 Missing ⚠️
cmd/argocd/commands/admin/app.go	71.42%	1 Missing and 1 partial ⚠️
controller/sync.go	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #21749      +/-   ##
==========================================
+ Coverage   55.63%   55.65%   +0.02%     
==========================================
  Files         339      339              
  Lines       56812    56826      +14     
==========================================
+ Hits        31609    31629      +20     
+ Misses      22553    22546       -7     
- Partials     2650     2651       +1     

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[leoluz]

LGTM

[andrii-korotkov-verkada]

Cherry pick PR for 2.14 #21819