We previously used ElasticSearch Curator for managing log
retention. Now that we have moved to OpenSearch, we can use
the Index State Management (ISM) plugin which is bundled with
OpenSearch.

This change adds support for automating the configuration of
the ISM plugin via the OpenSearch API. By default, it has
similar behaviour to the previous ElasticSearch Curator
default policy.

Closes-Bug: #2047037

Change-Id: I5c6d938f2bc380f1575ee4f16fe17c6dca37dcba