feat: add Prune as application level sync option

[MrFreezeex]

Related to https://github.com/argoproj/argo-cd/pull/23370 / https://github.com/argoproj/argo-cd/issues/23380

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 20.00000% with 8 lines in your changes missing coverage. Please review.

Project coverage is 47.54%. Comparing base (8849c3f) to head (a1d18d9). Report is 52 commits behind head on master.

Files with missing lines	Patch %	Lines
pkg/sync/sync_context.go	20.00%	8 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #734      +/-   ##
==========================================
- Coverage   54.26%   47.54%   -6.73%     
==========================================
  Files          64       64              
  Lines        6164     6575     +411     
==========================================
- Hits         3345     3126     -219     
- Misses       2549     3193     +644     
+ Partials      270      256      -14     

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[MrFreezeex]

(note that I only changed the second commit title that was point at the wrong sync option before :x)

[sonarqubecloud[bot]]

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

[MrFreezeex]

code LGTM. Missing unit test and waiting for answers in the linked argo CD PR

Thanks @agaudreault! I added some unit test for Prune=false and Prune=confirm, the latter didn't had any so far so I added some for Prune=confirm on a resource directly too