[AUTO] Increment version to 2.8.0-SNAPSHOT

[opensearch-trigger-bot]

• Incremented version to 2.8.0-SNAPSHOT.

[ylwu-amzn]

Build failed as common-utils not ready

Could not resolve org.opensearch:common-utils:2.8.0.0-SNAPSHOT

[ylwu-amzn]

From https://github.com/opensearch-project/ml-commons/actions/runs/4898540317/jobs/8747732671?pr=866

• What went wrong:
  A problem occurred configuring root project 'opensearch-ml'.
  java.util.concurrent.ExecutionException: org.gradle.api.GradleException: Failed to create Jar file /home/runner/.gradle/caches/jars-9/bc33e077f18aab4d8905d3690c9e67e4/jackson-core-2.15.0.jar.

[codecov]

Codecov Report

Merging #866 (134e065) into 2.x (134e065) will not change coverage.
The diff coverage is n/a.

❗ Current head 134e065 differs from pull request most recent head 0ec5d41. Consider uploading reports for the commit 0ec5d41 to get more accurate results

@@            Coverage Diff            @@
##                2.x     #866   +/-   ##
=========================================
  Coverage     84.18%   84.18%           
  Complexity     1764     1764           
=========================================
  Files           139      139           
  Lines          6780     6780           
  Branches        676      676           
=========================================
  Hits           5708     5708           
  Misses          774      774           
  Partials        298      298           

Flag	Coverage Δ
ml-commons	84.18% <0.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

[ylwu-amzn]

Close this one as @jngz-es is working on bumping to 2.8 in another PR #896