[Backport] [2.x] Bump io.projectreactor:reactor-core in /plugins/repository-azure (#8016)

[reta]

Backport of #8016 to 2.x

[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: FAILURE ❌
• URL: https://build.ci.opensearch.org/job/gradle-check/17593/
• CommitID: 061114e
  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: UNSTABLE ❕
• TEST FAILURES:

      1 org.opensearch.remotestore.SegmentReplicationUsingRemoteStoreIT.testDropPrimaryDuringReplication
      1 org.opensearch.indices.replication.SegmentReplicationRelocationIT.testPrimaryRelocationWithSegRepFailure

• URL: https://build.ci.opensearch.org/job/gradle-check/17597/
• CommitID: 62abe4a
  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 #8068 (62abe4a) into 2.x (8d5058f) will increase coverage by 0.04%.
The diff coverage is 71.42%.

@@             Coverage Diff              @@
##                2.x    #8068      +/-   ##
============================================
+ Coverage     70.65%   70.70%   +0.04%     
- Complexity    56729    56742      +13     
============================================
  Files          4697     4697              
  Lines        268550   268550              
  Branches      39714    39714              
============================================
+ Hits         189747   189881     +134     
+ Misses        62507    62404     -103     
+ Partials      16296    16265      -31     

Impacted Files	Coverage Δ
...n/java/org/opensearch/search/query/QueryPhase.java	78.80% <60.00%> (+0.66%)	⬆️
...rg/opensearch/search/rescore/RescoreProcessor.java	4.34% <100.00%> (ø)
...rg/opensearch/search/suggest/SuggestProcessor.java	14.28% <100.00%> (ø)

... and 448 files with indirect coverage changes