Revert "set validationwebhookconfig as Fail close by default for remote clusters (#28389)" (#29083)
Revert "set validationwebhookconfig as Fail close by default for remote clusters (#28389)" (#29083)

This reverts commit 33bc9561416791ba4cfbfc2fab8518ce1d343cce.
istio/istio,istio/istio,istio/istio,istio/istio,istio/istio