Add parent join support for faiss hnsw

[heemin32]

Description

Add parent join support for faiss hnsw

• Add patch to support multi vector in faiss
• Initialize id_map as null
• Add support of multi vector in jni
• Multi vector support for Faiss HNSW - approximate search only
• Add data generation script for nested field
• Add perf test for nested field

Issues Resolved

#1065

Check List

• New functionality includes testing.
  • All tests pass
• New functionality has been documented.
  • New functionality has javadoc added
• Commits are signed as 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]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (45e9e54) 84.91% compared to head (bc779e1) 84.96%.

Files	Patch %	Lines
...java/org/opensearch/knn/index/query/KNNWeight.java	93.33%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1398      +/-   ##
============================================
+ Coverage     84.91%   84.96%   +0.05%     
- Complexity     1259     1262       +3     
============================================
  Files           165      165              
  Lines          5138     5143       +5     
  Branches        480      480              
============================================
+ Hits           4363     4370       +7     
+ Misses          570      569       -1     
+ Partials        205      204       -1     

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[martin-gaievski]

Can you please add to description the list of PRs that we're merging from feature branch?

[martin-gaievski]

Please update PR description, overall PR looks good to me

[opensearch-trigger-bot]

The backport to 2.x failed:

The process '/usr/bin/git' failed with exit code 1

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add .worktrees/backport-2.x 2.x
# Navigate to the new working tree
cd .worktrees/backport-2.x
# Create a new branch
git switch --create backport/backport-1398-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 709b448d88bc168e1d7c137bf2cb539c33b28188
# Push it to GitHub
git push --set-upstream origin backport/backport-1398-to-2.x
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-2.x

Then, create a pull request where the base branch is 2.x and the compare/head branch is backport/backport-1398-to-2.x.

[heemin32]

Can you please add to description the list of PRs that we're merging from feature branch?

They appear in commits tab. Do you want them to be in description as well?