[BUG] Flaky org.opensearch.threadpool.ScalingThreadPoolTests.testScalingThreadPoolConfiguration test

[reta]

Describe the bug
The org.opensearch.threadpool.ScalingThreadPoolTests.testScalingThreadPoolConfiguration test became flaky after #7400

To Reproduce

./gradlew ':server:test' --tests "org.opensearch.threadpool.ScalingThreadPoolTests.testScalingThreadPoolConfiguration" -Dtests.seed=6EC695D9A055C669 

If the commit (#7400) is reverted, test passes normally (seems to be caused by REMOTE_REFRESH thread pool)

Expected behavior
Test should always pass

Plugins
Standard

Screenshots

• https://build.ci.opensearch.org/job/gradle-check/15255
• https://build.ci.opensearch.org/job/gradle-check/15143/

Host/Environment (please complete the following information):

• CI

Additional context
N/A

[reta]

@ashking94 could you please take a look?

[ashking94]

@ashking94 could you please take a look?

Ack

[ashking94]

thanks for creating this @reta. Here is the fix pr - #7539. Do take a look.