[Backport 1.x] Change test page size to avoid index/search TimeInMillis < 1 issue.

[opensearch-trigger-bot]

Backport 307ed55 from #460

[codecov-commenter]

Codecov Report

Merging #475 (307ed55) into 1.x (1059418) will decrease coverage by 0.05%.
The diff coverage is 69.07%.

❗ Current head 307ed55 differs from pull request most recent head acbbd3d. Consider uploading reports for the commit acbbd3d to get more accurate results

@@             Coverage Diff              @@
##                1.x     #475      +/-   ##
============================================
- Coverage     75.75%   75.69%   -0.06%     
- Complexity     2014     2460     +446     
============================================
  Files           253      314      +61     
  Lines         11475    14456    +2981     
  Branches       1816     2236     +420     
============================================
+ Hits           8693    10943    +2250     
- Misses         1755     2253     +498     
- Partials       1027     1260     +233     

Impacted Files	Coverage Δ
...pensearch/indexmanagement/IndexManagementRunner.kt	55.55% <0.00%> (ø)
...ndexmanagement/common/model/dimension/Dimension.kt	95.23% <ø> (+9.52%)	⬆️
...ent/common/model/notification/NotificationUtils.kt	0.00% <0.00%> (ø)
...exmanagement/indexstatemanagement/SkipExecution.kt	66.66% <ø> (+2.15%)	⬆️
...nagement/indexstatemanagement/model/ISMTemplate.kt	84.21% <ø> (+0.42%)	⬆️
...nagement/indexstatemanagement/model/StateFilter.kt	84.61% <ø> (+9.61%)	⬆️
...odel/coordinator/ClusterStateManagedIndexConfig.kt	85.71% <ø> (+19.04%)	⬆️
...ement/model/coordinator/SweptManagedIndexConfig.kt	78.12% <ø> (ø)
...nt/indexstatemanagement/model/destination/Chime.kt	55.55% <0.00%> (+1.01%)	⬆️
...statemanagement/model/destination/CustomWebhook.kt	67.14% <ø> (-25.62%)	⬇️
... and 445 more

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