[Backport 2.x] Redefine Drop Index as logical delete

[opensearch-trigger-bot]

Backport cb8d953 from #2386.

[codecov]

Codecov Report

Merging #2396 (2b6428d) into 2.x (1fd492e) will increase coverage by 0.07%.
The diff coverage is 99.60%.

@@             Coverage Diff              @@
##                2.x    #2396      +/-   ##
============================================
+ Coverage     95.60%   95.67%   +0.07%     
- Complexity     4959     5022      +63     
============================================
  Files           472      479       +7     
  Lines         13842    14021     +179     
  Branches        924      933       +9     
============================================
+ Hits          13234    13415     +181     
+ Misses          587      586       -1     
+ Partials         21       20       -1     

Flag	Coverage Δ
sql-engine	95.67% <99.60%> (+0.07%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
...rch/sql/opensearch/setting/OpenSearchSettings.java	100.00% <100.00%> (ø)
...park/asyncquery/AsyncQueryExecutorServiceImpl.java	100.00% <ø> (ø)
.../spark/asyncquery/model/AsyncQueryJobMetadata.java	86.88% <ø> (-3.74%)	⬇️
...search/sql/spark/dispatcher/AsyncQueryHandler.java	100.00% <ø> (ø)
...search/sql/spark/dispatcher/BatchQueryHandler.java	100.00% <100.00%> (ø)
...ensearch/sql/spark/dispatcher/IndexDMLHandler.java	100.00% <100.00%> (ø)
.../sql/spark/dispatcher/InteractiveQueryHandler.java	100.00% <ø> (ø)
...rch/sql/spark/dispatcher/SparkQueryDispatcher.java	100.00% <100.00%> (ø)
...ch/sql/spark/dispatcher/StreamingQueryHandler.java	100.00% <100.00%> (ø)
...rch/sql/spark/dispatcher/model/IndexDMLResult.java	100.00% <100.00%> (ø)
... and 11 more