[Backport 2.x] Disable concurrent segment search for system indices and throttled search requests

[jed326]

Description

Backport 2.x for #12954

Check List

• New functionality includes testing.
  • All tests pass
• New functionality has been documented.
  • New functionality has javadoc added
• Failing checks are inspected and point to the corresponding known issue(s) (See: Troubleshooting Failing Builds)
• Commits are signed per the DCO using --signoff
• Commit changes are listed out in CHANGELOG.md file (See: Changelog)
  - [ ] Public documentation issue/PR created

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[github-actions]

Compatibility status:

Checks if related components are compatible with change ab5c331

Incompatible components

Skipped components

Compatible components

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

[github-actions]

❕ Gradle check result for cb2b7a4: UNSTABLE

• TEST FAILURES:

      1 org.opensearch.backwards.MixedClusterClientYamlTestSuiteIT.test {p0=indices.get_field_mapping/20_missing_field/Return empty object if field doesn't exist, but index does}

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

All modified and coverable lines are covered by tests ✅

Project coverage is 71.26%. Comparing base (0dd892c) to head (ab5c331).
Report is 99 commits behind head on 2.x.

Additional details and impacted files

@@             Coverage Diff              @@
##                2.x   #12973      +/-   ##
============================================
- Coverage     71.28%   71.26%   -0.03%     
- Complexity    60145    60459     +314     
============================================
  Files          4957     4987      +30     
  Lines        282799   284530    +1731     
  Branches      41409    41604     +195     
============================================
+ Hits         201591   202766    +1175     
- Misses        64189    64721     +532     
- Partials      17019    17043      +24     

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[jed326]

@reta @sohami Here is the 2.x backport for #12954

[github-actions]

✅ Gradle check result for ab5c331: SUCCESS