Add new maintainers

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 69.47%. Comparing base (aabe211) to head (b1e28a5).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #634 +/- ## ============================================ + Coverage 69.32% 69.47% +0.14% - Complexity 371 373 +2 ============================================ Files 44 44 Lines 2706 2706 Branches 172 172 ============================================ + Hits 1876 1880 +4 + Misses 727 725 -2 + Partials 103 101 -2 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.

[bbarani]

@getsaurabh02 @khushbr maintainers.md file and codeowners should reflect the same list and none of these new folks are added as maintainers yet. You need to tag @opensearch-project/admins to add them as maintainers before merging this PR. codeowners file should be valid before merging this PR.