External Cert-Manager integration with ISTIO EgressGateway for mTLS is not working

Issue

• After using the external cert-manager, the services that need to egress using the mTLS certificates are not working.
• The Sidecar proxies for the applications appear to be looking for the mTLS certificates to be mounted in the same path as the EgressGateway, however these services should not need to have access to the certs.