[Backport 2.x] [MDS] Support for Timeline

[opensearch-trigger-bot[bot]]

Backport 73e5d78c968f1ab20d28eed6ac6ea772f9c6b620 from #6385.

[ZilongX]

is this one targeting 2.14. or 2.15 ? seen the 2.15 tag but if we merged into 2.x now it would be released out as part of 2.14

[codecov[bot]]

Codecov Report

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

Project coverage is 31.85%. Comparing base (9cbfa64) to head (087dd16). Report is 41 commits behind head on 2.x.

:exclamation: Current head 087dd16 differs from pull request most recent head ef9c3c0. Consider uploading reports for the commit ef9c3c0 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##              2.x    #6493      +/-   ##
==========================================
+ Coverage   31.75%   31.85%   +0.10%     
==========================================
  Files        2220     2223       +3     
  Lines       44686    44743      +57     
  Branches     6951     6960       +9     
==========================================
+ Hits        14190    14253      +63     
+ Misses      29839    29830       -9     
- Partials      657      660       +3     

Flag	Coverage Δ
Linux_1	31.85% <100.00%> (+0.10%)	:arrow_up:

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[zhongnansu]

is this one targeting 2.14. or 2.15 ? seen the 2.15 tag but if we merged into 2.x now it would be released out as part of 2.14

@huyaboo I think it's for 2.14, can you confirm?