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]

@gaiksaya @peterzhuamazon @ginkel you've all contributed to this repo - any interest in helping co-maintain it?

[dblock]

Verified that permissions are correct, MAINTAINERS and CODEOWNERS as well.

[peterzhuamazon]

@gaiksaya @peterzhuamazon @ginkel you've all contributed to this repo - any interest in helping co-maintain it?

@gaiksaya @peterzhuamazon @ginkel you've all contributed to this repo - any interest in helping co-maintain it?

Yes

[dblock]

@reta I'm going to add @peterzhuamazon, cool?

[reta]

@reta I'm going to add @peterzhuamazon, cool?

Totally, thanks @dblock !