Correct class definitions in deprecated package org.opensearch.actionsupport.master

[tlfeng]

Description

Correct the class definitions in the deprecated package org.opensearch.actionsupport.master
For reference, the original package before deprecation is: https://github.com/opensearch-project/OpenSearch/tree/2.0.1/server/src/main/java/org/opensearch/action/support/master
The package is deprecated in the PR #3593 / commit 223d472

• Use classes in the same package for inheritance (after extends) to keep original behavior
• Correct the class name in the Javadoc replaced by {@link #...}

Issues Resolved

Related to issue #3542

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.

[opensearch-ci-bot]

✅   Gradle Check success 3e32ffa
Log 6244

Reports 6244