Fixing the backward incompatible changes coming from core in ScoreScript class and index.store.hybrid.mmap.extensions settings

[navneet1v]

Fixing the backward incompatible changes coming from core in ScoreScript class and index.store.hybrid.mmap.extensions setting

Description

The change includes:

1. Fixing the backward incompatible changes in ScoreScript class. [Feature] Expose term frequency in Painless script score context OpenSearch#9081
2. index.store.hybrid.mmap.extensions settings is deprecated. Hence it is adding warnings and failing the unit tests. Added a workaround which is already added in the 2.x branch. This will ensure that main is unblocked. Will work on fixing this deprecated settings in future PRs.

Issues Resolved

NA

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.

[navneet1v]

Merging the changes as of now. the integ tests are failing. Working on fixing that too.

[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-1056-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 3df8308bbe7ce6559b559f32920c31a6b0ae3f20
# Push it to GitHub
git push --set-upstream origin backport/backport-1056-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-1056-to-2.x.