Deprecate classes in org.opensearch.action.support.master

[tlfeng]

Description

To support inclusive language, the master terminology is going to be replaced by cluster manager in the code base.
In PR #3556, the package org.opensearch.action.support.master has be renamed to org.opensearch.action.support.clustermanager, and the classes with "master" name are renamed as well.

This PR adds the old package and classes back to keep the backwards compatibility and marks them as deprecated.

• Add the classes back which got renamed in Deprecate package 'org.opensearch.action.support.master' #3542.
  All the files in the package are restored. https://github.com/opensearch-project/OpenSearch/tree/2.0.0/server/src/main/java/org/opensearch/action/support/master
• Deprecate the package org.opensearch.action.support.master and classes in the package with "master" in the names.
• Apply 3 changes to the classes in the "master" package.
  1 Remove all the methods in the classes.
  2 Make them extend the corresponding classes with "cluster manager" name.
  3 Add the same constructors with the corresponding "cluster manager" classes.

Issues Resolved

The second step for issue #3542
It will be resolved by a following PR to rename and deprecate the public methods and variables in the package.

Check List

• New functionality includes testing.
  • All tests pass
• New functionality has been documented.
  • New functionality has javadoc added
• 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.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[opensearch-ci-bot]

❌   Gradle Check failure 77c17f811a08f2850ccc4bb54d87225c95febab8
Log 6030

Reports 6030

[opensearch-ci-bot]

✅   Gradle Check success ea07151
Log 6032

Reports 6032

[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-3593-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 223d472e6d8ea4454cb05fba7271d213430a1a4e
# Push it to GitHub
git push --set-upstream origin backport/backport-3593-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-3593-to-2.x.

[tlfeng]

@dblock I'm so touched that you spent time reviewing the PR, thank you so much! 🚀