[Backport 2.x] Deprecate public methods and variables that contain 'master' terminology in class 'NoMasterBlockService' and 'MasterService'

[opensearch-trigger-bot]

Backport e65aaca from #4006

[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: SUCCESS ✅
• URL: https://build.ci.opensearch.org/job/gradle-check/1085/
• CommitID: 4528ddb

[codecov-commenter]

Codecov Report

Merging #4038 (4528ddb) into 2.x (5d1dc07) will increase coverage by 0.22%.
The diff coverage is 78.12%.

@@             Coverage Diff              @@
##                2.x    #4038      +/-   ##
============================================
+ Coverage     70.37%   70.59%   +0.22%     
- Complexity    56347    56449     +102     
============================================
  Files          4529     4529              
  Lines        271885   271894       +9     
  Branches      39989    39990       +1     
============================================
+ Hits         191328   191935     +607     
+ Misses        64453    63819     -634     
- Partials      16104    16140      +36     

Impacted Files	Coverage Δ
...org/opensearch/cluster/service/ClusterService.java	80.55% <0.00%> (ø)
.../opensearch/common/util/concurrent/BaseFuture.java	62.71% <0.00%> (ø)
...g/opensearch/cluster/coordination/Coordinator.java	79.46% <50.00%> (+1.57%)	⬆️
.../org/opensearch/cluster/service/MasterService.java	83.19% <62.50%> (+0.13%)	⬆️
...nsearch/cluster/coordination/JoinTaskExecutor.java	90.90% <100.00%> (+2.97%)	⬆️
...ter/coordination/NoClusterManagerBlockService.java	95.65% <100.00%> (-4.35%)	⬇️
...ster/coordination/AbstractCoordinatorTestCase.java	92.68% <100.00%> (-0.65%)	⬇️
...c/main/java/org/opensearch/test/RandomObjects.java	90.25% <100.00%> (-4.55%)	⬇️
.../java/org/opensearch/node/NodeClosedException.java	50.00% <0.00%> (-50.00%)	⬇️
...java/org/opensearch/threadpool/ThreadPoolInfo.java	56.25% <0.00%> (-37.50%)	⬇️
... and 485 more

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