Disabling docrep to remote store migration test for integTestRemote

[astute-decipher]

Description

Disabling docrep to remote store migration test for integTestRemote suite, since it's failing to pass opensearch.experimental.feature.remote_store.migration.enabled feature flag.

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~
• [x] Commits are signed per the DCO using --signoff

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[astute-decipher]

Change looks okay to me. How did we verify that integTestRemote is excluding this test method?

While running the individual test : ./gradlew ':integTestRemote' --tests "org.opensearch.replication.integ.rest.StartReplicationIT.test operations are fetched from lucene when leader is in mixed mode"

it fails with error :

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':integTestRemote'.
> No tests found for given includes: [**/*IT.class](include rules) [**/*$*.class](exclude rules) [org.opensearch.replication.integ.rest.StartReplicationIT.test operations are fetched from lucene when leader is in mixed mode](--tests filter)

Whereas we don't see this error, before the change. cc : @ankitkala

[nisgoel-amazon]

We can also run the integTestRemote complete suite by creating 2 clusters using docker and by passing the appropriate parameter

./gradlew integTestRemote -Dleader.http_host=172.18.0.2:9200 -Dfollower.http_host=172.18.0.3:9201 -Dfollower.transport_host=172.18.0.3:9301  -Dleader.transport_host=172.18.0.2:9300  -Dsecurity_enabled=false -Duser=admin -Dpassword=<Password of host> -PnumNodes=1