[Feature Request] Add credentials props to Elasticsearch configuration

[tsurdilo]

https://docs.temporal.io/docs/content/how-to-integrate-elasticsearch-into-a-temporal-cluster

shows configuration section for Elasticsearch. It is missing to add / mention credentials config properties "username" and "password".

You can see example here: https://github.com/temporalio/temporal/blob/master/docker/config_template.yaml#L166

[tsurdilo]

Community slack thread for request: https://temporalio.slack.com/archives/CTRCR8RBP/p1643722098563119

[flossypurse]