7.15 Release notes

Support for Elasticsearch v7.15.0 APIs.
We’ve tested and added documentation on best practices for leveraging the client in a Function-as-a-Service (FaaS) environment to the official docs.

New experimental endpoints: indices.disk_usage. indices.field_usage_stats, nodes.clear_repositories_metering_archive, get_repositories_metering_info, search_mvt
The index parameter is now required for open_point_in_time.
The index_metric parameter in nodes.stats adds the shards option.

New parameters for ml.put_job: ignore_unavailable, allow_no_indices, ignore_throttled, expand_wildcards.
New endpoint: security.query_api_keys.