[Backport 2.x] Implement abstract methods

[opensearch-trigger-bot]

Backport 0fbe5a7 from #1121

[codecov]

Codecov Report

Merging #1122 (f28c2b1) into 2.x (4bfc657) will increase coverage by 1.05%.
The diff coverage is 0.00%.

❗ Current head f28c2b1 differs from pull request most recent head fdf5b5c. Consider uploading reports for the commit fdf5b5c to get more accurate results

@@             Coverage Diff              @@
##                2.x    #1122      +/-   ##
============================================
+ Coverage     75.37%   76.42%   +1.05%     
- Complexity     1035     1042       +7     
============================================
  Files           141      141              
  Lines          4763     4764       +1     
  Branches        521      521              
============================================
+ Hits           3590     3641      +51     
+ Misses          828      782      -46     
+ Partials        345      341       -4     

Files Changed	Coverage Δ
.../replication/repository/RemoteClusterRepository.kt	74.28% <0.00%> (-0.54%)	⬇️

... and 6 files with indirect coverage changes