[Backport 2.x] [Star tree][Bug] Fix for derived metrics

[opensearch-trigger-bot]

Backport 71a771e from #15640.

[github-actions]

❌ Gradle check result for 17961f6: null

Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change?

[github-actions]

✅ Gradle check result for 17961f6: SUCCESS

[codecov]

Codecov Report

Attention: Patch coverage is 96.77419% with 1 line in your changes missing coverage. Please review.

Project coverage is 71.76%. Comparing base (5875393) to head (17961f6).
Report is 25 commits behind head on 2.x.

Files with missing lines	Patch %	Lines
...be/startree/fileformats/meta/StarTreeMetadata.java	93.75%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##                2.x   #15686      +/-   ##
============================================
+ Coverage     71.70%   71.76%   +0.06%     
- Complexity    64104    64235     +131     
============================================
  Files          5249     5251       +2     
  Lines        299681   300431     +750     
  Branches      43643    43725      +82     
============================================
+ Hits         214876   215615     +739     
+ Misses        66848    66749      -99     
- Partials      17957    18067     +110     

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[opensearch-trigger-bot]

The backport to 2.17 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-2.17 2.17
# Navigate to the new working tree
pushd ../.worktrees/backport-2.17
# Create a new branch
git switch --create backport/backport-15686-to-2.17
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 52ffa161278c45f4ffffd3b4908a2d2a141f37f3
# Push it to GitHub
git push --set-upstream origin backport/backport-15686-to-2.17
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/backport-2.17

Then, create a pull request where the base branch is 2.17 and the compare/head branch is backport/backport-15686-to-2.17.