Fix OLM install modes

[m1kola]

Summary

Currently with OLM we claim to support OwnNamespace, SingleNamespace, and AllNamespaces install modes.

However, only OwnNamespace works properly when deploying OpsManager. With other install modes, the operator is able to reconcile resources and create StatefulSets for the workloads in OpsManager, but pods never become healthy because only the operator's own namespace has the required ServiceAccount.

With this change, we make the relevant ServiceAccount managed by OLM. This means the ServiceAccount and relevant roles will be created in all required namespaces.

Proof of Work

Checklist

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