Release 2.19.0.0

[rursprung]

OpenSearch 2.19.0 has been released, see release notes.
Official OpenSearch release ticket: opensearch-project/opensearch-build#5152

important: the 2.18.0.0 release of the plugin is also still missing: #317
2.19.0 is the last minor release on 2.x, but patch releases will follow (see also opensearch-project/.github#250).
IMHO the 2.18.0 and 2.19.0 support should be released as soon as possible (i.e. now), any planned extensions (as mentioned in #317) can always come in a follow-up plugin release (e.g. 2.19.0.1) and shouldn't block the version compatibility.
on a related note: once opensearch-project/OpenSearch#17178 has been merged (and possibly cherry-picked to 2.19.x) these releases should be a lot less frequent once you adapted to this.

Checklist:

• Compatibility Matrix is updated (TODO: link to PR)
• Release 2.19.0.0 tag is present in the repo
• Release artifacts are available and downloadable
• Release notes published
• Forum announcement published

[lukas-vlcek]

Thanks for creating the ticket @rursprung !