Propagate includes and excludes from fetchSourceContext to FieldsVisitor

[Gankris96]

Description

The change is to propagate the source includes and source excludes fields that are present in the FetchSourceContext.
This is as part of the open questions in this RFC opensearch-project/k-NN#2377

Related Issues

PR is part of #2377
as part of the Derived source feature for k-NN.

Check List

• Functionality includes testing.
• API changes companion pull request created, if applicable.
• Public documentation issue/PR created, if applicable.

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.

[github-actions]

✅ Gradle check result for e17d6f9: SUCCESS

[codecov]

Codecov Report

Attention: Patch coverage is 73.91304% with 6 lines in your changes missing coverage. Please review.

Project coverage is 72.28%. Comparing base (13ab4ec) to head (eaec888).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...n/java/org/opensearch/search/fetch/FetchPhase.java	40.00%	0 Missing and 6 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #17080      +/-   ##
============================================
- Coverage     72.32%   72.28%   -0.05%     
+ Complexity    65477    65441      -36     
============================================
  Files          5309     5309              
  Lines        304306   304324      +18     
  Branches      44124    44132       +8     
============================================
- Hits         220098   219985     -113     
- Misses        66159    66278     +119     
- Partials      18049    18061      +12     

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[Gankris96]

@jmazanec15 please take a look

[github-actions]

❕ Gradle check result for 8a7b739: UNSTABLE

Please review all flaky tests that succeeded after retry and create an issue if one does not already exist to track the flaky failure.

[github-actions]

❌ Gradle check result for 2d45546: FAILURE

Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change?

[jmazanec15]

Overall structure looks good to me. A couple comments on the test

[github-actions]

❕ Gradle check result for 018905d: UNSTABLE

Please review all flaky tests that succeeded after retry and create an issue if one does not already exist to track the flaky failure.

[github-actions]

❌ Gradle check result for 9439534: FAILURE

Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change?

[github-actions]

✅ Gradle check result for eaec888: SUCCESS

[jed326]

LGTM, will wait on @jmazanec15 to take another look as well.

[jmazanec15]

LGTM thanks @Gankris96

[opensearch-trigger-bot]

The backport to 2.x failed:

The process '/usr/bin/git' failed with exit code 128

To backport manually, run these commands in your terminal:

# Navigate to the root of your repository
cd $(git rev-parse --show-toplevel)
# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add ../.worktrees/OpenSearch/backport-2.x 2.x
# Navigate to the new working tree
pushd ../.worktrees/OpenSearch/backport-2.x
# Create a new branch
git switch --create backport/backport-17080-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 931c1aadaed0d8eccee0839d74d706fb47dbd4be
# Push it to GitHub
git push --set-upstream origin backport/backport-17080-to-2.x
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/OpenSearch/backport-2.x

Then, create a pull request where the base branch is 2.x and the compare/head branch is backport/backport-17080-to-2.x.