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.

[dblock]

Permissions are incorrect. You have 10+ people with maintain access. Please work with admin to sync.

[junqiu-lei]

Thanks @dblock, just updated the maintain access permission to individual alias based on CODEOWNERS, thanks @peterzhuamazon help

[dblock]

There should be 3 maintainers according to maintainers file. This is what I see in settings.

[junqiu-lei]

Hi @dblock , the maintainers are updated, could you help double check? Thank you!

[dblock]

Doesn't look correct. You have all these people with write access that should not have it, only folks in MAINTAINERS should have maintain access. Please work with an admin on fixing it?

[junqiu-lei]

Updated, please help check whenever you get a chance, thanks! @dblock

[dblock]

Verified, thx. I added Triage group with triage permissions as well.