Bump OpenSearch Core main branch to 3.0.0 and update key id for native plugin checks

[peterzhuamazon]

Description

Bump OpenSearch Core main branch to 3.0.0 and update key id for native plugin checks

Related Issues

opensearch-project/opensearch-build#3747

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 15a8353: SUCCESS

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 72.55%. Comparing base (6afec2a) to head (15a8353).
Report is 6 commits behind head on main.

Files with missing lines	Patch %	Lines
...nsearch/tools/cli/plugin/InstallPluginCommand.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #18039      +/-   ##
============================================
- Coverage     72.57%   72.55%   -0.02%     
+ Complexity    67160    67126      -34     
============================================
  Files          5478     5478              
  Lines        310130   310132       +2     
  Branches      45087    45087              
============================================
- Hits         225068   225030      -38     
- Misses        66661    66735      +74     
+ Partials      18401    18367      -34     

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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-18039-to-3.0
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 caf5d71ff02c5250a820f3ec1b346eff37b1d230
# Push it to GitHub
git push --set-upstream origin backport/backport-18039-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-18039-to-3.0.