[BUG] Missing doc regarding opensearch_security.cookie/session

[SebastianThorn]

Describe the bug

Documentation regarding the following parameters is missing

opensearch_security.cookie.ttl: 3600000
opensearch_security.session.keepalive: true
opensearch_security.session.ttl: 3600000

They are refereed to in this forum-post: https://forum.opensearch.org/t/cookie-session-timeout/8508

opensearch_security.cookie.secure is documented in here: https://opensearch.org/docs/latest/install-and-configure/install-dashboards/tls/

Expected behavior Documentation on all parameters

Dashboards Version 2.17

Additional context I enjoy the was Grafana has it with all parameters on a single page, yes it's long, but it is all there. https://grafana.com/docs/grafana/latest/setup-grafana/configure-grafana/

[dblock]

Moving to docs repo. @SebastianThorn please do feel free to contribute!

[Catch All Triage - 1, 2, 3, 4]

[natebower]

@kolchfa-aws?