Update Specification and Re-generate Code

[reta]

Description

Update Specification and Re-generate Code

Issues Resolved

N/A

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[reta]

@Xtansia would really appreciate if you could take a look, fixing generator (SSE content type). which fails the automation right now, thank you

[opensearch-trigger-bot]

The backport to 3.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-java/backport-3.x 3.x
# Navigate to the new working tree
pushd ../.worktrees/opensearch-java/backport-3.x
# Create a new branch
git switch --create backport/backport-1890-to-3.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 779e31a2e579f684e608610a8e010b574ea00ef8
# Push it to GitHub
git push --set-upstream origin backport/backport-1890-to-3.x
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/opensearch-java/backport-3.x

Then, create a pull request where the base branch is 3.x and the compare/head branch is backport/backport-1890-to-3.x.