feat(operator): support Argo Rollout resources

[thschue]

fixes: #856

This PR:

• Enables the support of (Argo) Rollout resources as possible workloads
• Makes it possible to use Pre- and Post-Deployment Tasks with Rollouts

[codecov]

Codecov Report

Merging #879 (0352c29) into main (2c62593) will decrease coverage by 0.27%.
The diff coverage is 6.25%.

❗ Current head 0352c29 differs from pull request most recent head 55fcbbe. Consider uploading reports for the commit 55fcbbe to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #879      +/-   ##
==========================================
- Coverage   59.15%   58.88%   -0.27%     
==========================================
  Files         128      126       -2     
  Lines       10035    10038       +3     
==========================================
- Hits         5936     5911      -25     
- Misses       3884     3907      +23     
- Partials      215      220       +5     

Impacted Files	Coverage Δ
...lers/lifecycle/keptnworkloadinstance/controller.go	81.16% <ø> (-1.80%)	⬇️
...keptnworkloadinstance/reconcile_deploymentstate.go	72.22% <0.00%> (-13.03%)	⬇️
...rator/webhooks/pod_mutator/pod_mutating_webhook.go	35.48% <20.00%> (-0.36%)	⬇️

... and 7 files with indirect coverage changes

Flag	Coverage Δ
certificate-operator	64.15% <ø> (ø)
component-tests	59.00% <0.00%> (-1.84%)	⬇️
lifecycle-operator	78.31% <6.25%> (-0.17%)	⬇️
metrics-operator	77.35% <ø> (-0.23%)	⬇️
scheduler	21.17% <ø> (-0.59%)	⬇️

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[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.1% Duplication