Init registry singleton with sync.once (#14203)
Init registry singleton with sync.once (#14203)

* add rpm to build artificats.

* init registry singleton using once.

* remove unrelated changes.

geeknoid/istio,geeknoid/istio,geeknoid/istio,smawson/istio,istio/istio,istio/istio,geeknoid/istio,geeknoid/istio,smawson/istio,istio/istio,smawson/istio,istio/istio,smawson/istio,geeknoid/istio,smawson/istio,istio/istio,smawson/istio