[Backport 2.3] 556: Moved _doc_count from transform._doc_count to root of document

[opensearch-trigger-bot]

Backport c908871 from #558

[codecov-commenter]

Codecov Report

Merging #661 (4d701d3) into 2.3 (d93ef76) will decrease coverage by 0.14%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##                2.3     #661      +/-   ##
============================================
- Coverage     75.87%   75.73%   -0.15%     
+ Complexity     2483     2469      -14     
============================================
  Files           315      315              
  Lines         14511    14513       +2     
  Branches       2245     2245              
============================================
- Hits          11010    10991      -19     
- Misses         2249     2267      +18     
- Partials       1252     1255       +3     

Impacted Files	Coverage Δ
...earch/indexmanagement/transform/model/Transform.kt	85.59% <100.00%> (-0.31%)	⬇️
...nt/indexstatemanagement/model/destination/Slack.kt	55.55% <0.00%> (-22.23%)	⬇️
...arch/indexmanagement/rollup/RollupSearchService.kt	57.40% <0.00%> (-7.41%)	⬇️
...ansform/action/explain/ExplainTransformResponse.kt	79.31% <0.00%> (-6.90%)	⬇️
...gement/indexstatemanagement/action/ShrinkAction.kt	69.11% <0.00%> (-2.95%)	⬇️
...dexmanagement/transform/model/TransformMetadata.kt	89.32% <0.00%> (-2.92%)	⬇️
...anagement/indexstatemanagement/model/Transition.kt	63.01% <0.00%> (-2.74%)	⬇️
...ent/indexstatemanagement/util/ManagedIndexUtils.kt	76.10% <0.00%> (-1.77%)	⬇️
.../opensearch/indexmanagement/rollup/model/Rollup.kt	85.58% <0.00%> (-0.47%)	⬇️
... and 3 more

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.