Fix flaky test : RemoteMigrationIndexMetadataUpdateIT.testRemoteIndexPathFileExistsAfterMigration

[astute-decipher]

Description

• In RemoteMigrationIndexMetadataUpdateIT.testRemoteIndexPathFileExistsAfterMigration test we validate if remote index path file exists on the migrated index on remote node.
• In test, we are first creating a DocRep cluster with 1 cluster manager , 2 Data nodes. After that we add 1 remote cluster manager node and 2 remote nodes.
• So previously in order to elect remote cluster manager as active master we were terminating docRep cluster manager, due to which we were running into issue NodeClosedException when other nodes try to join the cluster.
• To avoid the issue we will be using voting config exclusion to elect the remote cluster manager instead of terminating it.
• With the fix, the flaky test ran for 5500+ iterations without failing locally.

Related Issues

Resolves #13939

Check List

• [ ] Functionality includes testing.
• [ ] API changes companion pull request created, if applicable.
• [ ] Public documentation issue/PR created, if applicable.

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[github-actions]

❕ Gradle check result for 9b8d70b: UNSTABLE

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

All modified and coverable lines are covered by tests ✅

Project coverage is 71.66%. Comparing base (b15cb0c) to head (9b8d70b).
Report is 450 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #14433      +/-   ##
============================================
+ Coverage     71.42%   71.66%   +0.23%     
- Complexity    59978    62056    +2078     
============================================
  Files          4985     5118     +133     
  Lines        282275   291849    +9574     
  Branches      40946    42181    +1235     
============================================
+ Hits         201603   209139    +7536     
- Misses        63999    65445    +1446     
- Partials      16673    17265     +592     

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