Change log level of SegRep cancellations to debug

[mch2]

Description

Change log level of SegRep cancellations to debug. These are noisy in tests where replication is cancelled on node drop.

Related Issues

related #8452

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)

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.

[opensearch-trigger-bot]

Compatibility status:

Checks if related components are compatible with change bf10ff7

Incompatible components

Incompatible components: [https://github.com/opensearch-project/index-management.git, https://github.com/opensearch-project/asynchronous-search.git, https://github.com/opensearch-project/notifications.git, https://github.com/opensearch-project/security-analytics.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/anomaly-detection.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/common-utils.git, https://github.com/opensearch-project/reporting.git, https://github.com/opensearch-project/k-nn.git, https://github.com/opensearch-project/geospatial.git, https://github.com/opensearch-project/cross-cluster-replication.git, https://github.com/opensearch-project/neural-search.git, https://github.com/opensearch-project/performance-analyzer.git, https://github.com/opensearch-project/ml-commons.git, https://github.com/opensearch-project/performance-analyzer-rca.git, https://github.com/opensearch-project/opensearch-oci-object-storage.git]

[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: UNSTABLE ❕
• TEST FAILURES:

      1 org.opensearch.snapshots.CloneSnapshotIT.testShallowCloneNameAvailability
      1 org.opensearch.index.IndexServiceTests.testAsyncTranslogTrimTaskOnClosedIndex

• URL: https://build.ci.opensearch.org/job/gradle-check/23051/
• CommitID: 0c1f2c7
  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 #9445 (0c1f2c7) into main (f3957ea) will decrease coverage by 0.09%.
Report is 9 commits behind head on main.
The diff coverage is 61.53%.

@@             Coverage Diff              @@
##               main    #9445      +/-   ##
============================================
- Coverage     71.24%   71.15%   -0.09%     
+ Complexity    57472    57420      -52     
============================================
  Files          4776     4776              
  Lines        270711   270713       +2     
  Branches      39574    39574              
============================================
- Hits         192874   192638     -236     
- Misses        61610    61893     +283     
+ Partials      16227    16182      -45     

Files Changed	Coverage Δ
...s/replication/SegmentReplicationTargetService.java	56.75% <61.53%> (-1.88%)	⬇️

... and 465 files with indirect coverage changes

[dbwiddis]

LGTM