Fix core XcontentFactory refactor

[Hailong-am]

Description

Downstream changes for XContentFactory refactor in core

Issues Resolved

opensearch-project/OpenSearch#8826

Check List

• Commits are signed per the DCO using --signoff

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[codecov]

Codecov Report

Merging #732 (20ff68d) into main (58a7578) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##               main     #732   +/-   ##
=========================================
  Coverage     66.19%   66.19%           
  Complexity      253      253           
=========================================
  Files            39       39           
  Lines          1698     1698           
  Branches        158      158           
=========================================
  Hits           1124     1124           
  Misses          456      456           
  Partials        118      118           

Flag	Coverage Δ
opensearch-notifications	66.19% <ø> (ø)

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[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/notifications/backport-2.x 2.x
# Navigate to the new working tree
pushd ../.worktrees/notifications/backport-2.x
# Create a new branch
git switch --create backport/backport-732-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 216dfcb95eff41ab04785980e89c0bd260b34042
# Push it to GitHub
git push --set-upstream origin backport/backport-732-to-2.x
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/notifications/backport-2.x

Then, create a pull request where the base branch is 2.x and the compare/head branch is backport/backport-732-to-2.x.