[Backport 2.1] flaky transform test fix attempt

[opensearch-trigger-bot]

Backport 5217af0 from #542

[codecov-commenter]

Codecov Report

Merging #548 (eaf5ee1) into 2.1 (9d34598) will increase coverage by 0.17%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##                2.1     #548      +/-   ##
============================================
+ Coverage     75.77%   75.94%   +0.17%     
- Complexity     2462     2466       +4     
============================================
  Files           313      313              
  Lines         14411    14411              
  Branches       2227     2227              
============================================
+ Hits          10920    10945      +25     
+ Misses         2245     2221      -24     
+ Partials       1246     1245       -1     

Impacted Files	Coverage Δ
...nt/indexstatemanagement/model/destination/Slack.kt	55.55% <0.00%> (-22.23%)	⬇️
...ensearch/indexmanagement/util/JobSchedulerUtils.kt	73.91% <0.00%> (-8.70%)	⬇️
...earch/indexmanagement/transform/model/Transform.kt	85.04% <0.00%> (-0.43%)	⬇️
.../opensearch/indexmanagement/rollup/model/Rollup.kt	86.04% <0.00%> (+0.46%)	⬆️
...ent/indexstatemanagement/util/ManagedIndexUtils.kt	77.87% <0.00%> (+1.76%)	⬆️
.../rollup/action/start/TransportStartRollupAction.kt	75.29% <0.00%> (+2.35%)	⬆️
...dexmanagement/transform/model/TransformMetadata.kt	92.23% <0.00%> (+2.91%)	⬆️
...gement/indexstatemanagement/action/ShrinkAction.kt	72.05% <0.00%> (+2.94%)	⬆️
...statemanagement/model/destination/CustomWebhook.kt	95.71% <0.00%> (+28.57%)	⬆️

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