Fail fast for empty kubebuilder assets

[PannagaRao]

Signed-off-by: Pannaga Rao Bhoja Ramamanohara

What type of PR is this?

/kind bug
/kind flake

What this PR does / why we need it:

Fail fast when setup-envtest fails to download binaries instead of running all test suites only to fail in BeforeSuite with etcd not found in $PATH

Which issue(s) this PR fixes:

Fixes # #9821

Special notes for your reviewer:

Does this PR introduce a user-facing change?

NONE

[k8s-ci-robot]

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[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: PannagaRao
Once this PR has been reviewed and has the lgtm label, please assign gabesaba, mbobrovskyi for approval. For more information see the Code Review Process.

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[mimowo]

/ok-to-test