[cluster-reflector] how to add Azure credentials into a kind cluster that the controller can use?

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Lets add some instructions on

• E.g. Generate some long lasting az token
• Add them to a secret
• Mount secret as env on cluster-reflector deployment?

So we can demo/test controller against az using Kind as the hub (which won't have implicit az credentails)

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• Add some instructions to cluster-reflector-controller/docs/getting-started.md

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• Give a recommended option for aws, and maybe mention other options too that we don't recommend too.

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• add a note to CAPI that we can only query/generate gitopsclusters in the same namespace as the ACD