[Search Pipelines] Changing Version Check to 2.9

[mingshl]

Changing version check to 2.9.
Related backport PR - #8376

Related Issues

Resolves #6723

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
• Commit changes are listed out in CHANGELOG.md file (See: Changelog)

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 (Jenkins) Run Completed with:

• RESULT: FAILURE ❌
• URL: https://build.ci.opensearch.org/job/gradle-check/18992/
• CommitID: fab522e
  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: FAILURE ❌
• URL: https://build.ci.opensearch.org/job/gradle-check/19169/
• CommitID: bebff97
  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?

[mingshl]

backport PR - #8376 got in, rerunning the gradlew check should pass

[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: UNSTABLE ❕
• TEST FAILURES:

      1 org.opensearch.remotestore.SegmentReplicationUsingRemoteStoreIT.testNodeDropWithOngoingReplication
      1 org.opensearch.indices.replication.SegmentReplicationIT.testScrollCreatedOnReplica

• URL: https://build.ci.opensearch.org/job/gradle-check/19193/
• CommitID: bebff97
  Please review all flaky tests that succeeded after retry and create an issue if one does not already exist to track the flaky failure.

[codecov]

Codecov Report

Merging #8416 (bebff97) into main (9e4e54d) will increase coverage by 0.02%.
The diff coverage is 0.00%.

@@             Coverage Diff              @@
##               main    #8416      +/-   ##
============================================
+ Coverage     70.91%   70.94%   +0.02%     
- Complexity    56925    56931       +6     
============================================
  Files          4759     4759              
  Lines        269189   269189              
  Branches      39399    39399              
============================================
+ Hits         190896   190968      +72     
+ Misses        62205    62081     -124     
- Partials      16088    16140      +52     

Impacted Files	Coverage Δ
...rch/action/admin/cluster/node/stats/NodeStats.java	50.54% <0.00%> (ø)

... and 474 files with indirect coverage changes