Add Integtest.sh for OpenSearch integtest setups (workbench)

[peterzhuamazon]

Description

Add Integtest.sh for OpenSearch integtest setups (workbench)

Issues Resolved

Add workbench integTest for OpenSearch integtest setups

Check List

• New functionality includes testing.
  • All tests pass, including unit test, integration test and doctest
• New functionality has been documented.
  • New functionality has javadoc added
  • New functionality has user manual doc added
• Commits are signed per the DCO using --signoff

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.89%. Comparing base (c37c423) to head (4ca0eab).
⚠️ Report is 1268 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##               main     #157   +/-   ##
=========================================
  Coverage     99.89%   99.89%           
  Complexity     2471     2471           
=========================================
  Files           245      245           
  Lines          5748     5748           
  Branches        333      333           
=========================================
  Hits           5742     5742           
  Misses            5        5           
  Partials          1        1           

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