feat(verification): add promotion verification mechanisms based on rollouts analysis templates

[krancour]

Fixes #1159

• Mimics a subset of Rollouts resource types, similar to what was done in use a minimal subset of argo cd resource types #989
• Adds Phase field to StageStatus to establish a more concrete Stage lifecycle.
• Adds Verification field to Stage to define AnalysisTemplate-based promotion verification processes.
• Makes Stage reconciliation loop kick off AnalysisRuns
• Factors AnalysisRun results into Stage verification
• Listens for completed AnalysisRuns to enqueue corresponding Stage for reconciliation

About 50% of this is codegen, but the PR is large regardless.

@jessesuen could I suggest that we tackle reviewing this in layers? Changes to the Kargo resource types are isolated to commit 4e35b64. If you zeroed in on just that one commit for now, I think we'd be able to work through any inadvertent misalignment between what you had in mind and what I've implemented.

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[codecov]

Codecov Report

Attention: 944 lines in your changes are missing coverage. Please review.

Comparison is base (7021905) 49.41% compared to head (bbd89bf) 46.99%.
Report is 14 commits behind head on main.

Files	Patch %	Lines
...ler/rollouts/api/v1alpha1/zz_generated.deepcopy.go	4.92%	644 Missing and 13 partials ⚠️
api/v1alpha1/zz_generated.deepcopy.go	0.00%	91 Missing and 1 partial ⚠️
internal/controller/analysis/analysis_runs.go	6.81%	78 Missing and 4 partials ⚠️
internal/controller/stages/verification.go	77.77%	72 Missing and 2 partials ⚠️
...ntroller/rollouts/api/v1alpha1/analysis_helpers.go	53.84%	12 Missing ⚠️
internal/controller/stages/stages.go	84.48%	9 Missing ⚠️
internal/kubeclient/indexer.go	72.72%	8 Missing and 1 partial ⚠️
...controller/rollouts/api/v1alpha1/analysis_types.go	0.00%	7 Missing ⚠️
internal/controller/promotions/promotions.go	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1259      +/-   ##
==========================================
- Coverage   49.41%   46.99%   -2.43%     
==========================================
  Files         128      134       +6     
  Lines        9892    11225    +1333     
==========================================
+ Hits         4888     5275     +387     
- Misses       4844     5767     +923     
- Partials      160      183      +23     

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[jessesuen]

Awesome work!