🌱 fake-client: extend builder with an option to set a RESTMapper

[sbueringer]

Signed-off-by: Stefan Büringer buringerst@vmware.com

This PR extends the fake client to make it possible to set a RESTMapper (e.g. a meta.DefaultRESTMapper).
This enables users of the fake client to write tests for funcs which use the REST mapping of a Client.

I encountered this limitation when I tried to implement a unit test in CAPI for a func which uses the REST mapping of the Client (or fake client in case of the unit test) to check if a resource is namespaced.

xref: https://github.com/kubernetes-sigs/cluster-api/pull/5383/files

[alvaroaleman]

thanks!

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: alvaroaleman, sbueringer

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[sbueringer]

/cherrypick release-0.10

[k8s-infra-cherrypick-robot]

@sbueringer: cannot cherry-pick an unmerged PR

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/cherrypick release-0.10

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[sbueringer]

/cherrypick release-0.10

[k8s-infra-cherrypick-robot]

@sbueringer: new pull request created: #1686

In response to this:

/cherrypick release-0.10

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