[CI] ForecastIT testOverflowToDisk failing

[elasticsearchmachine]

Build Scans:

• elasticsearch-periodic #5111 / graalvm-ce17_checkpart4_java-matrix
• elasticsearch-periodic #5087 / graalvm-ce17_checkpart4_java-matrix

Reproduction Line:

./gradlew ":x-pack:plugin:ml:qa:native-multi-node-tests:javaRestTest" --tests "org.elasticsearch.xpack.ml.integration.ForecastIT.testOverflowToDisk" -Dtests.seed=3BB615DC337D87CB -Dtests.locale=bg-BG -Dtests.timezone=America/Cambridge_Bay -Druntime.java=17

Applicable branches:
8.x

Reproduces locally?:
N/A

Failure History:
See dashboard

Failure Message:

java.lang.AssertionError: 
Expected: one of {<finished>}
     but: was <scheduled>

Issue Reasons:

• [8.x] 2 failures in test testOverflowToDisk (1.3% fail rate in 150 executions)
• [8.x] 2 failures in step graalvm-ce17_checkpart4_java-matrix (40.0% fail rate in 5 executions)
• [8.x] 2 failures in pipeline elasticsearch-periodic (40.0% fail rate in 5 executions)

Note:
This issue was created using new test triage automation. Please report issues or feedback to es-delivery.

[elasticsearchmachine]

Pinging @elastic/ml-core (Team:ML)