Expand target support to OpenSearch v1.3

[peternied]

Description

Expand target support to OpenSearch v1.3

Updated the java end to end test cases to read from the same list for
target platforms.

Check List

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

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[codecov]

Codecov Report

Attention: Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 80.64%. Comparing base (85d5846) to head (a7c98aa).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
...ions/bulkload/transformers/TransformFunctions.java	0.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1074      +/-   ##
============================================
+ Coverage     80.18%   80.64%   +0.45%     
- Complexity     2867     2894      +27     
============================================
  Files           383      383              
  Lines         14340    14342       +2     
  Branches        989      989              
============================================
+ Hits          11499    11566      +67     
+ Misses         2247     2183      -64     
+ Partials        594      593       -1     

Flag	Coverage Δ
gradle-test	78.75% <75.00%> (+0.54%)	⬆️
python-test	90.24% <ø> (ø)

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[gregschohn]

This LGTM. Since there's no documentation change that says that we support OS1.x in this PR, this change by itself makes the codebase better & I'm happy to approve it.

However, I'd like to see one more case added to the ParallelDocumentMigrationsTest (it's already setup to take a list of targets and do parameterized testing, so it's one line). That test will take into account any differences that might occur in work coordination due to running on a different version of the cluster doing the work coordination.