[AUTO] [2.x] Add bwc version 2.7.1.

[opensearch-trigger-bot]

I've noticed that a new tag 2.7.0 was pushed, and added a bwc version 2.7.1.

[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: FAILURE ❌
• URL: https://build.ci.opensearch.org/job/gradle-check/14755/
• CommitID: 549d78b
  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 (Jenkins) Run Completed with:

• RESULT: SUCCESS ✅
• URL: https://build.ci.opensearch.org/job/gradle-check/14763/
• CommitID: 549d78b

[codecov-commenter]

Codecov Report

Merging #7371 (549d78b) into 2.x (7279e43) will increase coverage by 0.05%.
The diff coverage is 100.00%.

📣 This organization is not using Codecov’s GitHub App Integration. We recommend you install it so Codecov can continue to function properly for your repositories. Learn more

@@             Coverage Diff              @@
##                2.x    #7371      +/-   ##
============================================
+ Coverage     70.23%   70.28%   +0.05%     
+ Complexity    59632    59622      -10     
============================================
  Files          4850     4847       -3     
  Lines        287212   287164      -48     
  Branches      41728    41723       -5     
============================================
+ Hits         201735   201845     +110     
+ Misses        68555    68358     -197     
- Partials      16922    16961      +39     

Impacted Files	Coverage Δ
server/src/main/java/org/opensearch/Version.java	83.84% <100.00%> (-0.44%)	⬇️

... and 502 files with indirect coverage changes

[opensearch-trigger-bot]

The backport to main failed:

The process '/usr/bin/git' failed with exit code 128

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-main main
# Navigate to the new working tree
pushd ../.worktrees/backport-main
# Create a new branch
git switch --create backport/backport-7371-to-main
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 5a5c2692af93df14d40efc639daea99699b0edad
# Push it to GitHub
git push --set-upstream origin backport/backport-7371-to-main
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/backport-main

Then, create a pull request where the base branch is main and the compare/head branch is backport/backport-7371-to-main.