Baseline MAINTAINERS, CODEOWNERS, and external collaborator permissions

[dblock]

Follow opensearch-project/.github#125 to baseline MAINTAINERS, CODEOWNERS, and external collaborator permissions.

Close this issue when:

1. MAINTAINERS.md has the correct list of project maintainers.
2. CODEOWNERS exists and has the correct list of aliases.
3. Repo permissions only contain individual aliases as collaborators with maintain rights, admin, and triage teams.
4. All other teams are removed from repo permissions.

If this repo's permissions was already baselined, please confirm the above when closing this issue.

[pajuric]

@dblock @wbeckler - checking status here.

[wbeckler]

The next moves are:

• a maintainer in the project-website repo adds a CODEOWNERS file with the list of maintainers that is in the MAINTAINERS.md.
• Adjust the permissions so that those with maintainer access to this repo matches the list

[krisfreedain]

@dblock @wbeckler - I will work on this

[krisfreedain]

https://github.com/opensearch-project/project-website/blob/main/MAINTAINERS.md looks good.

[dblock]

Repo permissions are incorrect. Please work with @bbarani's team to adjust.

• only admin team should be admin
• individuals from maintainers should each have maintain level access

[dtaivpp]

Okay, @dblock I changed the role for that group to 'maintain'. Admins are managed by the global admin group that is still attached.

[dblock]

@dtaivpp That's incorrect. Please see the tickets above for what was expected and why we want to delete groups.

You need to have admin = admin, each maintainer individually = maintain, triage = write, delete the project-website group.

[bbarani]

Fixed the permissions. Need to move the CODEOWNERS file to .github/CODEOWNERS.

[dblock]

Verified, thx.