[Backport 3.1] using asyncrequest instead of direct search (#1535)

[amitgalitz]

Description

backporting #1535 to 3.1

Check List

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[codecov]

Codecov Report

❌ Patch coverage is 55.88235% with 15 lines in your changes missing coverage. Please review.
✅ Project coverage is 81.68%. Comparing base (4e3133c) to head (3f77a77).
⚠️ Report is 1 commits behind head on 3.1.

Files with missing lines	Patch %	Lines
...h/timeseries/rest/handler/IntervalCalculation.java	55.88%	14 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##                3.1    #1536      +/-   ##
============================================
+ Coverage     81.65%   81.68%   +0.03%     
- Complexity     6036     6045       +9     
============================================
  Files           536      536              
  Lines         24401    24427      +26     
  Branches       2493     2494       +1     
============================================
+ Hits          19925    19954      +29     
+ Misses         3241     3239       -2     
+ Partials       1235     1234       -1     

Flag	Coverage Δ
plugin	81.68% <55.88%> (+0.03%)	⬆️

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Files with missing lines	Coverage Δ
...opensearch/timeseries/constant/CommonMessages.java	97.61% <ø> (ø)
...h/timeseries/rest/handler/IntervalCalculation.java	73.70% <55.88%> (-3.35%)	⬇️

... and 14 files with indirect coverage changes

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