Adding cancellation start time in client side TaskInfo

[sgup432]

Description

Adding cancellation start time in client side Task info object. Looks like rest high java client is on deprecation path but still adding it in case it doesn't break stuff.

Original change which was added few months back - #7445.

Related Issues

Resolves #[Issue number to be closed when this PR is merged]

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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[sgup432]

@andrross @dblock Can you check on this?
Also do we require change log for this?

[sgup432]

@msfroh @saratvemulapalli @VachaShah

[github-actions]

Compatibility status:

Checks if related components are compatible with change 1774f45

Incompatible components

Skipped components

Compatible components

Compatible components: [https://github.com/opensearch-project/security-analytics.git, https://github.com/opensearch-project/security.git, https://github.com/opensearch-project/custom-codecs.git, https://github.com/opensearch-project/opensearch-oci-object-storage.git, https://github.com/opensearch-project/index-management.git, https://github.com/opensearch-project/geospatial.git, https://github.com/opensearch-project/sql.git, https://github.com/opensearch-project/job-scheduler.git, https://github.com/opensearch-project/notifications.git, https://github.com/opensearch-project/observability.git, https://github.com/opensearch-project/k-nn.git, https://github.com/opensearch-project/neural-search.git, https://github.com/opensearch-project/cross-cluster-replication.git, https://github.com/opensearch-project/alerting.git, https://github.com/opensearch-project/performance-analyzer.git, https://github.com/opensearch-project/anomaly-detection.git, https://github.com/opensearch-project/performance-analyzer-rca.git, https://github.com/opensearch-project/asynchronous-search.git, https://github.com/opensearch-project/ml-commons.git, https://github.com/opensearch-project/common-utils.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/26660/
• CommitID: 16dbada
  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/27023/
• CommitID: 1774f45

[codecov]

Codecov Report

Merging #10326 (1774f45) into main (28f185b) will increase coverage by 0.12%.
Report is 3 commits behind head on main.
The diff coverage is 50.00%.

@@             Coverage Diff              @@
##               main   #10326      +/-   ##
============================================
+ Coverage     71.09%   71.21%   +0.12%     
- Complexity    58209    58338     +129     
============================================
  Files          4830     4830              
  Lines        274840   274846       +6     
  Branches      40048    40049       +1     
============================================
+ Hits         195384   195721     +337     
+ Misses        63052    62737     -315     
+ Partials      16404    16388      -16     

Files	Coverage Δ
...ain/java/org/opensearch/client/tasks/TaskInfo.java	63.04% <50.00%> (+0.25%)	⬆️

... and 441 files with indirect coverage changes