Update opensearchproject/opensearch Docker tag to v2.19.0

[renovate]

This PR contains the following updates:

Package	Update	Change
opensearchproject/opensearch	minor	2.18.0 -> 2.19.0

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Release Notes

opensearch-project/OpenSearch (opensearchproject/opensearch)

v2.19.0

Compare Source

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Configuration

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 64.33%. Comparing base (7af2824) to head (8297254).
Report is 14 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #9953      +/-   ##
==========================================
+ Coverage   64.30%   64.33%   +0.02%     
==========================================
  Files         655      655              
  Lines       62996    62996              
  Branches     6977     6983       +6     
==========================================
+ Hits        40511    40528      +17     
+ Misses      22485    22468      -17     

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