[2.1] Revert renaming masterOperation() to clusterManagerOperation()

[tlfeng]

Description

Backport PR #3681 to 2.1 branch.

Restore all the abstract methods that deprecated and renamed in PR #3617 to its original appearance.
(The original files are: https://github.com/opensearch-project/OpenSearch/tree/2.0.1/server/src/main/java/org/opensearch/action/support/master).

• Revert deprecating abstract method masterOperation() of class TransportClusterManagerNodeReadAction
• Revert deprecating abstract method doMasterOperation() of class TransportClusterInfoAction
• Remove the alternative methods clusterManagerOperation() and doClusterManagerOperation()

Issues Resolved

#3683

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

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[opensearch-ci-bot]

✅   Gradle Check success 792dd53
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