Storage class gp2 not found for Loki in RHOCP 4

Issue

After deploying the LokiStack custom resource with gp2 or gp3 as storageClassName, the message below appears in openshift-logging namespace events:
```
storageclass.storage.k8s.io "gp2" not found 
```
What Storageclass are provisioned by Loki?

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