[MVP] Introduce controller's configuration

[mikouaj]

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Description

Introduce configuration object for the controller itself to allow adjusting settings like:

• k8s client QPS and burst value
• possibility to disable cert-controller when webhooks are not needed (local run and development)
• boost manager check interval

The configuration should be specified by an API object and mounted as a file to controller's PODs from the ConfigMap.

References

N/A

[mikouaj]

Configuration will be loaded from the env variables instead of the configuration file