Remove package org.opensearch.transport.grpc and replace with org.opensearch.plugin.transport.grpc

[karenyrx]

Description

Files were misplaced under org.opensearch.transport.grpc instead of org.opensearch.plugin.transport.grpc.

Related Issues

#16787

Check List

• Functionality includes testing.
• API changes companion pull request created, if applicable.
• Public documentation issue/PR created, if applicable.

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.

[github-actions]

✅ Gradle check result for e465184: SUCCESS

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 72.56%. Comparing base (6afec2a) to head (e465184).
Report is 2 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #18031      +/-   ##
============================================
- Coverage     72.57%   72.56%   -0.01%     
+ Complexity    67160    67122      -38     
============================================
  Files          5478     5478              
  Lines        310130   310130              
  Branches      45087    45087              
============================================
- Hits         225068   225048      -20     
- Misses        66661    66725      +64     
+ Partials      18401    18357      -44     

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[opensearch-trigger-bot]

The backport to 3.0 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/backport-3.0 3.0
# Navigate to the new working tree
pushd ../.worktrees/OpenSearch/backport-3.0
# Create a new branch
git switch --create backport/backport-18031-to-3.0
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 e25f3320aeab4e6bd00490f0ed6b185f49589a00
# Push it to GitHub
git push --set-upstream origin backport/backport-18031-to-3.0
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/OpenSearch/backport-3.0

Then, create a pull request where the base branch is 3.0 and the compare/head branch is backport/backport-18031-to-3.0.