Support namespaced resources in ExtraResources

[jtv8]

What problem are you facing?

The ExtraResources kind does not currently support namespace-scoped resources.

Now that Crossplane v2 is in public release and supports namespace-scoped managed resources, it's quite likely that users of this function will want to retrieve such a resource that already exists on the cluster and use its manifest in other resources.

In my specific case, I'd like to reference some of the parameters of a namespace-scoped ProviderConfig in another resource.

How could this Function help solve your problem?

Extend the ExtraResources API by allowing a namespace to be specified:

apiVersion: meta.gotemplating.fn.crossplane.io/v1alpha1
kind: ExtraResources
requirements:
  some-foo-by-name:
    # Resources can be requested either by name
    apiVersion: example.com/v1beta1
    kind: Foo
    matchName: "some-extra-foo"
    namespace: "some-namespace"

[haarchri]

we need first new sdk release with: crossplane/function-sdk-go#226