feat: Ability for lint command to inspect referenced resources

[zachaller]

This is the first half of adding the ability for the lint cmd to reference other resources. It currently supports Ingress, VirtualServices, and Services.

[codecov]

Codecov Report

Merging #2030 (a5a5802) into master (4333b4f) will increase coverage by 0.18%.
The diff coverage is 91.55%.

@@            Coverage Diff             @@
##           master    #2030      +/-   ##
==========================================
+ Coverage   82.42%   82.60%   +0.18%     
==========================================
  Files         119      120       +1     
  Lines       16913    17176     +263     
==========================================
+ Hits        13940    14188     +248     
- Misses       2282     2284       +2     
- Partials      691      704      +13     

Impacted Files	Coverage Δ
.../apis/rollouts/validation/validation_references.go	87.68% <ø> (-0.04%)	⬇️
pkg/kubectl-argo-rollouts/cmd/lint/lint.go	85.29% <91.55%> (+17.39%)	⬆️
metricproviders/prometheus/prometheus.go	96.42% <0.00%> (-3.58%)	⬇️
analysis/analysis.go	85.53% <0.00%> (-0.59%)	⬇️
utils/defaults/defaults.go	88.35% <0.00%> (ø)
utils/conditions/conditions.go	80.76% <0.00%> (ø)
rollout/trafficrouting/traefik/traefik.go	81.25% <0.00%> (ø)
utils/aws/aws.go	72.92% <0.00%> (+0.48%)	⬆️
rollout/trafficrouting.go	81.70% <0.00%> (+0.64%)	⬆️
... and 1 more

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[leoluz]

I think we should only lint with the available resources that we currently have. We can't translate the exact validation that happens server-side in the client.

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
5 Code Smells

No Coverage information
0.0% Duplication

[leoluz]

LGTM