Add TopNSearchTasksLogger settings to Cluster Settings (#6716)

[PritLadani]

Description

We introduced Task Resource Consumer to log task resource information at a specified interval as a part of #2293. However, newly introduced dynamic settings cluster.task.consumers.top_n.size and cluster.task.consumers.top_n.frequency are not registered under ClusterSettings.BUILT_IN_CLUSTER_SETTINGS and hence not recognised when trying to change the value. We need to register them in ClusterSettings.BUILT_IN_CLUSTER_SETTINGS to make them dynamic. Making this change to fix the issue.

Issues Resolved

#6708

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)

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[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: UNSTABLE ❕
• TEST FAILURES:

      2 org.opensearch.cluster.service.MasterServiceTests.classMethod
      2 org.opensearch.cluster.service.MasterServiceTests.classMethod
      1 org.opensearch.indices.replication.SegmentReplicationIT.testScrollWithOngoingSegmentReplication
      1 org.opensearch.cluster.service.MasterServiceTests.testThrottlingForMultipleTaskTypes
      1 org.opensearch.cluster.service.MasterServiceTests.testThrottlingForMultipleTaskTypes

• URL: https://build.ci.opensearch.org/job/gradle-check/14284/
• CommitID: 56f090c
  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-commenter]

Codecov Report

Merging #7242 (56f090c) into 2.7 (df0d8e2) will decrease coverage by 0.17%.
The diff coverage is 89.47%.

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@@             Coverage Diff              @@
##                2.7    #7242      +/-   ##
============================================
- Coverage     70.36%   70.20%   -0.17%     
+ Complexity    59740    59594     -146     
============================================
  Files          4847     4847              
  Lines        287115   287127      +12     
  Branches      41716    41716              
============================================
- Hits         202029   201576     -453     
- Misses        68252    68671     +419     
- Partials      16834    16880      +46     

Impacted Files	Coverage Δ
...rg/opensearch/common/settings/ClusterSettings.java	92.85% <ø> (ø)
...ensearch/tasks/consumer/TopNSearchTasksLogger.java	91.89% <84.61%> (-4.66%)	⬇️
server/src/main/java/org/opensearch/node/Node.java	85.13% <100.00%> (+0.04%)	⬆️
...search/backpressure/SearchBackpressureService.java	87.73% <100.00%> (ø)
...rc/main/java/org/opensearch/tasks/TaskManager.java	65.74% <100.00%> (+0.21%)	⬆️

... and 508 files with indirect coverage changes

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