Support for federated credetials

[nixx]

Would be really nice to have support for federated credentials.

Good work btw

[tronghn]

Could you elaborate a little on the use cases?

Do you have any suggestions on how this would look like for the "end-user" that wants to add federated credentials to their application? Would this be configured individually per resource and require additions to the CRD, or configured centrally through static flags in Azurerator?

Would you use this in addition to the existing password and key credentials that are generated and registered, or as a complete replacement? The latter will likely require some refactoring.

Can't promise that we'll get to looking at this in the near future though due to other priorities.