Baselines the MAINTAINERS.md and CODEOWNERS files per #2275

[dlvenable]

Description

Baselines the MAINTAINERS.md and CODEOWNERS files.

Adds the Emeritus section with previous maintainers.

Issues Resolved

Resolves #2275

Check List

• New functionality includes testing.
• New functionality has been documented.
  • New functionality has javadoc added
• Commits are signed with a real name per the DCO

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[dlvenable]

@opensearch-project/admin, Please update the permissions of this repository to match the users included in the CODEOWNERS file shown in this PR.

[dlvenable]

@opensearch-project/admin, Please also remove old teams associated with the repository.

[gaiksaya]

Hi @dlvenable ,

Updated the permissions as below:

Let me know if anything needs to be changed

[codecov-commenter]

Codecov Report

Merging #2564 (b3a307c) into main (a053d40) will increase coverage by 0.02%.
The diff coverage is n/a.

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@@             Coverage Diff              @@
##               main    #2564      +/-   ##
============================================
+ Coverage     93.44%   93.46%   +0.02%     
- Complexity     2163     2167       +4     
============================================
  Files           256      257       +1     
  Lines          6037     6059      +22     
  Branches        488      488              
============================================
+ Hits           5641     5663      +22     
+ Misses          268      267       -1     
- Partials        128      129       +1     

see 5 files with indirect coverage changes

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[dlvenable]

Thank you @gaiksaya !