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[ENHANCE] rate limiting for restarting the same resource #1183

Description

@camaeel

Is your feature request related to a problem? Please describe.
We had misconfigured cert-manager's Certificate resources. Two Certificates wanted to manage same secret. Certificate was updated all the time causing Reloader to reload deployment.
Deployment had over 80k replicasets until we noticed the issue (control-plane started having stability issues).

Describe the solution you'd like
Reloader could have some rate limiting functionality to mitigate too frequent restarts.

Describe alternatives you've considered
Alerts when too many replicasets are created for one deployment.

Additional context
Add any other context or screenshots about the feature request here.

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