Add controllers tests for real Reconcile loop running with setup-envtest

[dmvolod]

User Story

As a developer I would like to run real controller reconcile loop for better testing, i.e. update or full lifecycle

Detailed Description

It would be nice to run controller test with SetupWithManager in addition to the single Reconcile(...) function just one time.
This is a big limitation, as setup-envetest fake Kubernetes cluster already bootstrapped in unit tests but not utilized in integration.
No CR updates can be tested with single Reconcile approach, as well as some features, introduced on the Kubernetes API server level, i.e. metadata Observed value, ObjectRefrence, Finalizers, etc. are not allowed.

Anything else you would like to add:

It would be nice to add real reconcile integration tests inside the controller package in addition to the single Reconcile unit tests and before real e2e tests introduced in #147.

/kind feature