Add support for unauthenticated OPTIONS (preflight) requests in Istio AuthorizationPolicy resources to allow CORS
The goal of this MR is to add support for unauthenticated OPTIONS (preflight) requests in Istio AuthorizationPolicy resources to allow CORS. Currently, single-page applications such as Angular apps are not able to call the OSDU APIs due to Istio rejecting unauthenticated OPTIONS requests sent by the user's browser.