Point deprecated settings to the new location.

[msfroh]

Description

I was looking through some cluster settings, stumbled across the search back-pressure settings, saw they were deprecated, and the Javadoc alluded to some myserious new settings.

I'm adding links to the class with the new settings to help future developers.

Related Issues

N/A

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)
• Public documentation issue/PR created

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]

Compatibility status:

Checks if related components are compatible with change a645e7c

Incompatible components

Incompatible components: [https://github.com/opensearch-project/geospatial.git, https://github.com/opensearch-project/ml-commons.git]

Skipped components

Compatible components

Compatible components: [https://github.com/opensearch-project/security.git, https://github.com/opensearch-project/alerting.git, https://github.com/opensearch-project/index-management.git, https://github.com/opensearch-project/anomaly-detection.git, https://github.com/opensearch-project/job-scheduler.git, https://github.com/opensearch-project/sql.git, https://github.com/opensearch-project/asynchronous-search.git, https://github.com/opensearch-project/common-utils.git, https://github.com/opensearch-project/observability.git, https://github.com/opensearch-project/k-nn.git, https://github.com/opensearch-project/reporting.git, https://github.com/opensearch-project/security-analytics.git, https://github.com/opensearch-project/custom-codecs.git, https://github.com/opensearch-project/cross-cluster-replication.git, https://github.com/opensearch-project/performance-analyzer.git, https://github.com/opensearch-project/opensearch-oci-object-storage.git, https://github.com/opensearch-project/performance-analyzer-rca.git, https://github.com/opensearch-project/neural-search.git]

[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: FAILURE ❌
• URL: https://build.ci.opensearch.org/job/gradle-check/27465/
• CommitID: 9a1856a
  Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green.
  Is the failure a flaky test unrelated to your change?

[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: UNSTABLE ❕
• TEST FAILURES:

      1 org.opensearch.smoketest.SmokeTestMultiNodeClientYamlTestSuiteIT.test {yaml=pit/10_basic/Delete all}

• URL: https://build.ci.opensearch.org/job/gradle-check/27751/
• CommitID: a645e7c
  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]

Codecov Report

Merging #10522 (a645e7c) into main (6c02261) will increase coverage by 0.10%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##               main   #10522      +/-   ##
============================================
+ Coverage     71.12%   71.22%   +0.10%     
- Complexity    58391    58418      +27     
============================================
  Files          4845     4845              
  Lines        275335   275335              
  Branches      40088    40088              
============================================
+ Hits         195827   196106     +279     
+ Misses        63147    62810     -337     
- Partials      16361    16419      +58     

Files	Coverage Δ
...kpressure/settings/SearchBackpressureSettings.java	92.59% <ø> (ø)

... and 449 files with indirect coverage changes