Deprecate public methods and variables that contain 'master' terminology in 'client' directory

[tlfeng]

Description

To support inclusive language, the master terminology is going to be replaced by cluster manager in the code base.
This PR deprecate public and protected methods/variable that contains master terminology in the name in client directory, and create alternatives.

List of public methods to be renamed in client directory:

public void setMasterTimeout(TimeValue clusterManagerTimeout)
public TimeValue masterNodeTimeout()
public TimeValue getMasterNodeTimeout()
public void setMasterNodeTimeout(@Nullable TimeValue clusterManagerNodeTimeout)
public void setMasterNodeTimeout(String clusterManagerNodeTimeout)
public boolean isMasterEligible()

List of public variables to be renamed in client directory:

public static final TimeValue DEFAULT_MASTER_NODE_TIMEOUT

Other changes:

• 3 String type usage:
  

  OpenSearch/client/rest/src/main/java/org/opensearch/client/NodeSelector.java

  Line 102 in 31f4b7a

  return "SKIP_DEDICATED_MASTERS";

  
  

  OpenSearch/client/rest-high-level/src/test/java/org/opensearch/client/RequestConvertersTests.java

  Line 2131 in 31f4b7a

  TimeValue clusterManagerTimeout = TimeValue.parseTimeValue(randomTimeValue(), "random_master_timeout");

  
  

  OpenSearch/client/rest-high-level/src/test/java/org/opensearch/client/RequestConvertersTests.java

  Line 2114 in 31f4b7a

  s -> request.setClusterManagerTimeout(TimeValue.parseTimeValue(s, request.getClass().getName() + ".masterNodeTimeout")),

Issues Resolved

A part of #3544

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.

[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: FAILURE ❌
• URL: https://build.ci.opensearch.org/job/gradle-check/860/
• CommitID: 31f4b7a

[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: SUCCESS ✅
• URL: https://build.ci.opensearch.org/job/gradle-check/862/
• CommitID: 31f4b7a

[tlfeng]

@Rishikesh1159 Thank you so much for your review! 👍

[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-3966-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 ccf1d15618770acd54be9b3f37e731612a42e2d6
# Push it to GitHub
git push --set-upstream origin backport/backport-3966-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-3966-to-2.x.