Refactor XContentType to mediaType

[Hailong-am]

Description

1. update to fix compile issue for refactoring XContentType to mediaType in core
2. bump bwc version to 2.10.0

Issues Resolved

opensearch-project/OpenSearch#8636

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]

Codecov Report

Merging #721 (a8d26e8) into main (52eaba6) will increase coverage by 4.35%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##               main     #721      +/-   ##
============================================
+ Coverage     61.84%   66.19%   +4.35%     
- Complexity      114      253     +139     
============================================
  Files            73       39      -34     
  Lines          2495     1698     -797     
  Branches        266      158     -108     
============================================
- Hits           1543     1124     -419     
+ Misses          775      456     -319     
+ Partials        177      118      -59     

Flag	Coverage Δ
opensearch-notifications	66.19% <ø> (+4.35%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage Δ
...org/opensearch/notifications/NotificationPlugin.kt	97.43% <ø> (ø)
...pensearch/notifications/action/PluginBaseAction.kt	43.93% <ø> (+0.65%)	⬆️
...earch/notifications/index/ConfigIndexingActions.kt	60.82% <ø> (+4.14%)	⬆️
...opensearch/notifications/index/ConfigOperations.kt	0.00% <ø> (ø)
...pensearch/notifications/index/ConfigQueryHelper.kt	90.99% <ø> (ø)
...opensearch/notifications/index/EventQueryHelper.kt	0.00% <ø> (ø)
...rch/notifications/index/NotificationConfigIndex.kt	70.12% <ø> (+0.45%)	⬆️
.../org/opensearch/notifications/model/DocMetadata.kt	89.65% <ø> (ø)
...earch/notifications/model/NotificationConfigDoc.kt	100.00% <ø> (ø)
...notifications/model/SendTestNotificationRequest.kt	100.00% <ø> (ø)
... and 8 more

... and 35 files with indirect coverage changes

[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-721-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 d0a322cb518a5294207b954f8877da6b15629338
# Push it to GitHub
git push --set-upstream origin backport/backport-721-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-721-to-2.x.