[Retrospective] Release Version 2.15.0

[peterzhuamazon]

Related release issue?

#4681

How to use this issue?

Please add comments to this Retro Board, they can be small or large in scope. Honest feedback is important to improve our processes, suggestions are also welcomed but not required.

What will happen to this issue post release?

There will be a discussion(s) about how the release went and how the next release can be improved. Then this ticket will be updated with the notes of that discussion along side action items.

[peterzhuamazon]

Adding a retro board for people to add items:

• https://github.com/orgs/opensearch-project/projects/205/views/4

Thanks.

[peterzhuamazon]

We completed the retro on 2024/06/28 9:00AM PST.

Thanks.