UPSTREAM: <carry>: Support cluster-aware APIReader client

[astefanutti]

Fixes #23.

[stevekuznetsov]

I understand the approach but if we are to propose this upstream, having a user-provided (but defaulted) factory for this read-only/live client would make more sense in the context of how the rest of this library works.

[astefanutti]

I understand the approach but if we are to propose this upstream, having a user-provided (but defaulted) factory for this read-only/live client would make more sense in the context of how the rest of this library works.

Thanks and agreed. I've re-pushed with the new factory approach to be consistent with the existing extension model.

[openshift-ci]

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