Multi rollup ndx search

[petardz]

Issue #, if available:
#321

Description of changes:

Added integration tests

CheckList:

• Commits are signed per the DCO using --signoff

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[codecov-commenter]

Codecov Report

Merging #453 (1b9fb8b) into main (b8a77d4) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##               main     #453   +/-   ##
=========================================
  Coverage     75.76%   75.76%           
+ Complexity     2470     2466    -4     
=========================================
  Files           314      314           
  Lines         14440    14440           
  Branches       2233     2233           
=========================================
  Hits          10940    10940           
+ Misses         2255     2250    -5     
- Partials       1245     1250    +5     

Impacted Files	Coverage Δ
...ent/rollup/action/explain/ExplainRollupResponse.kt	76.19% <0.00%> (-9.53%)	⬇️
...gement/indexstatemanagement/action/ShrinkAction.kt	66.17% <0.00%> (-5.89%)	⬇️
...gement/transform/model/ContinuousTransformStats.kt	70.37% <0.00%> (-3.71%)	⬇️
...rch/indexmanagement/rollup/model/RollupMetadata.kt	84.30% <0.00%> (-1.75%)	⬇️
.../rollup/action/start/TransportStartRollupAction.kt	71.76% <0.00%> (-1.18%)	⬇️
...nt/rollup/action/stop/TransportStopRollupAction.kt	76.47% <0.00%> (-1.18%)	⬇️
...earch/indexmanagement/transform/model/Transform.kt	85.47% <0.00%> (-0.43%)	⬇️
.../opensearch/indexmanagement/rollup/model/Rollup.kt	86.04% <0.00%> (ø)
...nt/indexstatemanagement/ManagedIndexCoordinator.kt	69.29% <0.00%> (ø)
...ent/indexstatemanagement/util/ManagedIndexUtils.kt	77.87% <0.00%> (+1.76%)	⬆️
... and 3 more

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