Istio version bug

When deploying istio it uses incosistent versions:

• helm get values -n istio-system istio-operator | grep -E "tag|hub" returns 1.14.0

hub: msosdu.azurecr.io/istio  
tag:1.14.0

• istioctl proxy-status returns 1.15-alpha

search-5f4cd9db56-7m8g5.osdu-azure                         Kubernetes     SYNCED     SYNCED     SYNCED     SYNCED     NOT SENT     istiod-7cd8fbf49b-pgfjl     1.15-alpha.782eb2a914e485d31c09dcd28f7a5839a7b8a874

Alpha versions should not be used in any OSDU environment

Impact: all OSDU environments