Release template improvement suggestions about opensearch-build HOT 1 OPEN

[Triage]
Thanks @dbwiddis, as you suggested we can improve and update the template, the another approach I was thinking is keep the global release issue (part of the build repo, ex 2.14.0) as the single source source of truth to surface all the release related information.

In the progress of the release cycle there are lot of changes (sometimes including dates) are added/updated to the release issue, its very tedious process now go back and update all the component release issues with specific information for a release manager. Today even though the creation of component release issues is automated the update is not. Also sometimes not all component release issues are acknowledged and I did notice in past they remain untriaged with no assignee even after the release.

So I would like to reduce this overhead and keep the global release issue as the single source of truth with all the information as needed for a component release manager.

One drawback I see for this is there is no information about the component level release manager, today a release manager will be tagging the assignee of the component release issue when there is an action required from a component (plugin). To fix this I would propose to have an additional entry criteria to have a component level release manager assigned and this can be taken care by the repo maintainers.

Adding @bbarani @gaiksaya @peterzhuamazon @rishabh6788 @dblock

from opensearch-build.