Fix upstream refactor changes

[VijayanB]

Description

XContent is moved from common to core .
Upstream change: opensearch-project/OpenSearch#5902.

Issues Resolved

Check List

• Commits are signed 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.
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[codecov-commenter]

Codecov Report

Merging #226 (80ba3e5) into main (0d5763f) will decrease coverage by 0.17%.
The diff coverage is n/a.

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@@             Coverage Diff              @@
##               main     #226      +/-   ##
============================================
- Coverage     85.06%   84.89%   -0.17%     
  Complexity      378      378              
============================================
  Files            52       52              
  Lines          1185     1185              
  Branches         98       98              
============================================
- Hits           1008     1006       -2     
- Misses          135      137       +2     
  Partials         42       42              

Impacted Files	Coverage Δ
...geospatial/action/upload/geojson/IndexManager.java	85.71% <ø> (ø)
...spatial/action/upload/geojson/PipelineManager.java	91.66% <ø> (ø)
...on/upload/geojson/UploadGeoJSONRequestContent.java	92.85% <ø> (ø)
...l/action/upload/geojson/UploadGeoJSONResponse.java	86.48% <ø> (ø)
...earch/geospatial/index/mapper/xypoint/XYPoint.java	74.13% <ø> (ø)
...geospatial/index/mapper/xypoint/XYPointParser.java	73.46% <ø> (ø)
...atial/index/query/xyshape/XYShapeQueryBuilder.java	78.04% <ø> (ø)
...opensearch/geospatial/plugin/GeospatialPlugin.java	92.85% <ø> (ø)
...s/bucket/geogrid/GeoHexGridAggregationBuilder.java	76.00% <ø> (ø)
.../aggregations/bucket/geogrid/ParsedGeoHexGrid.java	100.00% <ø> (ø)
... and 8 more

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[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-226-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 8eb3571cc01f4d51dd63a7820c6080436d971ed8
# Push it to GitHub
git push --set-upstream origin backport/backport-226-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-226-to-2.x.