[Backport 2.x] Performance improvements for BytesRefHash

[opensearch-trigger-bot]

Backport 3a8bbe9 from #8788.

[github-actions]

Compatibility status:

Checks if related components are compatible with change 48dd012

Incompatible components

Incompatible components: [https://github.com/opensearch-project/notifications.git, https://github.com/opensearch-project/index-management.git, https://github.com/opensearch-project/cross-cluster-replication.git, https://github.com/opensearch-project/performance-analyzer.git]

Skipped components

Compatible components

Compatible components: [https://github.com/opensearch-project/geospatial.git, https://github.com/opensearch-project/security.git, https://github.com/opensearch-project/neural-search.git, https://github.com/opensearch-project/security-analytics.git, https://github.com/opensearch-project/sql.git, https://github.com/opensearch-project/job-scheduler.git, https://github.com/opensearch-project/observability.git, https://github.com/opensearch-project/k-nn.git, https://github.com/opensearch-project/alerting.git, https://github.com/opensearch-project/anomaly-detection.git, https://github.com/opensearch-project/asynchronous-search.git, https://github.com/opensearch-project/common-utils.git, https://github.com/opensearch-project/performance-analyzer-rca.git, https://github.com/opensearch-project/ml-commons.git, https://github.com/opensearch-project/reporting.git]

[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: FAILURE ❌
• URL: https://build.ci.opensearch.org/job/gradle-check/23507/
• CommitID: 48dd012
  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: SUCCESS ✅
• URL: https://build.ci.opensearch.org/job/gradle-check/23512/
• CommitID: 48dd012

[codecov]

Codecov Report

Merging #9554 (48dd012) into 2.x (c0aba88) will increase coverage by 0.12%.
Report is 2 commits behind head on 2.x.
The diff coverage is 89.43%.

@@             Coverage Diff              @@
##                2.x    #9554      +/-   ##
============================================
+ Coverage     70.78%   70.91%   +0.12%     
- Complexity    57647    57719      +72     
============================================
  Files          4768     4769       +1     
  Lines        272388   272461      +73     
  Branches      40121    40125       +4     
============================================
+ Hits         192811   193208     +397     
+ Misses        63062    62693     -369     
- Partials      16515    16560      +45     

Files Changed	Coverage Δ
...g/opensearch/common/util/ReorganizingLongHash.java	93.65% <75.00%> (-1.67%)	⬇️
...rc/main/java/org/opensearch/common/hash/T1ha1.java	89.23% <89.23%> (ø)
.../java/org/opensearch/common/util/BytesRefHash.java	89.18% <89.70%> (+1.31%)	⬆️
...n/src/main/java/org/opensearch/common/Numbers.java	89.69% <100.00%> (+0.10%)	⬆️
...ggregations/bucket/terms/BytesKeyedBucketOrds.java	87.50% <100.00%> (ø)
.../aggregations/bucket/terms/SignificanceLookup.java	96.49% <100.00%> (+3.50%)	⬆️
...ations/bucket/terms/StringRareTermsAggregator.java	92.42% <100.00%> (ø)

... and 449 files with indirect coverage changes