Support Kubernetes secrets / dapr

[fgheysels]

Arcus.Security has a great support for Azure KeyVault and some other secret providers

However, afaik, we do not currently support Kubernetes secrets. Actually, a Kubernetes secret can be just retrieved from the configuration, and that is also how I'm doing it right now. (I am adding the configuration as a secret provider). Maybe be can improve this ? Making it a bit more explicit ?

Next to that, when creating services that run in Kubernetes, people are also making use of Dapr. One of the Dapr components is for secret management.
It allows you to abstract access to your secret store: you configure the dapr secret component to connect to KeyVault for instance , and from your application code you use the dapr api to retrieve the secret. More info can be found here.

I think we should consider creating an Arcus secretprovider so that you're able to interact with your Dapr secret component. This allows developers to abstract away the communication with the Dapr API to get their secrets.

Originally posted as a discussion here