Ensure cross-project contraint is not enforced
Ensure cross-project contraint is not enforced

Make sure that the cross project impersonation constraint
in the k8s-releng-project is not enforced. This allows
service accounts from other projects access to impersonate
the signer accounts.

Signed-off-by: Adolfo García Veytia (Puerco) <9de42c8261a7cacaae239656a4dd6991d9b9250f@uservers.net>

kubernetes/k8s.io,kubernetes/k8s.io,kubernetes/k8s.io,kubernetes/k8s.io