[Backport 2.x] Adding @gbbafna to code owners (#5695)

[gbbafna]

Signed-off-by: Gaurav Bafna [email protected]

Description

[Describe what this change achieves]

Issues Resolved

[List any issues this PR will resolve]

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.

[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: SUCCESS ✅
• URL: https://build.ci.opensearch.org/job/gradle-check/8921/
• CommitID: 83630ff

[codecov-commenter]

Codecov Report

Merging #5725 (83630ff) into 2.x (85b85b1) will decrease coverage by 0.01%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##                2.x    #5725      +/-   ##
============================================
- Coverage     70.53%   70.52%   -0.02%     
- Complexity    58612    58628      +16     
============================================
  Files          4741     4741              
  Lines        280588   280588              
  Branches      40894    40894              
============================================
- Hits         197918   197884      -34     
- Misses        66152    66208      +56     
+ Partials      16518    16496      -22     

Impacted Files	Coverage Δ
...adonly/AddIndexBlockClusterStateUpdateRequest.java	0.00% <0.00%> (-75.00%)	⬇️
...opensearch/persistent/PersistentTasksExecutor.java	22.22% <0.00%> (-44.45%)	⬇️
...rch/client/transport/NoNodeAvailableException.java	28.57% <0.00%> (-42.86%)	⬇️
...readonly/TransportVerifyShardIndexBlockAction.java	9.75% <0.00%> (-41.47%)	⬇️
...indices/readonly/TransportAddIndexBlockAction.java	20.68% <0.00%> (-37.94%)	⬇️
...regations/metrics/AbstractHyperLogLogPlusPlus.java	51.72% <0.00%> (-37.94%)	⬇️
...java/org/opensearch/threadpool/ThreadPoolInfo.java	56.25% <0.00%> (-37.50%)	⬇️
...pensearch/action/ingest/DeletePipelineRequest.java	31.25% <0.00%> (-37.50%)	⬇️
.../indices/readonly/AddIndexBlockRequestBuilder.java	0.00% <0.00%> (-33.34%)	⬇️
...main/java/org/opensearch/ingest/ProcessorInfo.java	21.05% <0.00%> (-26.32%)	⬇️
... and 478 more

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