Skip the namespace check for integration test

[houshengbo]

Proposed Changes

• This PR skips the namespace check, because the namespace in the Manifest can be overwritten by injected namespace. When the CR is deleted, the original namespace can still exist.

Release Note

[knative-prow-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: houshengbo, jcrossley3

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