Allow unauthenticated access to ES from whitelisted IPs

[3h4x]

what

• Allow IP-based Policy which allows for access without request signing

why

• As keycloak-gatekeeper should have direct access to Kibana

references

• https://docs.aws.amazon.com/elasticsearch-service/latest/developerguide/es-ac.html#es-ac-types-ip
• https://aws.amazon.com/premiumsupport/knowledge-center/anonymous-not-authorized-elasticsearch/

[3h4x]

/test all