Changing the BWC version to 2.8.0

[khushbr]

Is your feature request related to a problem? Please provide an existing Issue # , or describe.
Changing the BWC version to 2.8.0, made the corresponding change in 2.x to publish the 2.8.0 Snapshots, available at https://aws.oss.sonatype.org/content/repositories/snapshots/org/opensearch/gradle/build-tools/

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A clear and concise description of any alternative solutions or features you've considered.

Additional context
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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.

[codecov]

Codecov Report

Merging #446 (52a5c16) into main (9524c08) will not change coverage.
The diff coverage is n/a.

❗ Current head 52a5c16 differs from pull request most recent head dec858a. Consider uploading reports for the commit dec858a to get more accurate results

@@            Coverage Diff            @@
##               main     #446   +/-   ##
=========================================
  Coverage     72.13%   72.13%           
  Complexity      375      375           
=========================================
  Files            44       44           
  Lines          2591     2591           
  Branches        173      173           
=========================================
  Hits           1869     1869           
  Misses          614      614           
  Partials        108      108           

[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-446-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 92ab90bb0a622b6c188b76ed379687bdf9f2217b
# Push it to GitHub
git push --set-upstream origin backport/backport-446-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-446-to-2.x.

[opensearch-trigger-bot]

The backport to 2.8 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-2.8 2.8
# Navigate to the new working tree
cd .worktrees/backport-2.8
# Create a new branch
git switch --create backport/backport-446-to-2.8
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 92ab90bb0a622b6c188b76ed379687bdf9f2217b
# Push it to GitHub
git push --set-upstream origin backport/backport-446-to-2.8
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-2.8

Then, create a pull request where the base branch is 2.8 and the compare/head branch is backport/backport-446-to-2.8.