[CI] SetSingleNodeAllocateStepTests testPerformActionSomeShardsOnlyOnNewNodes failing

[elasticsearchmachine]

Build Scans:

• elasticsearch-periodic-platform-support #10991 / almalinux-8_platform-support-unix
• elasticsearch-periodic-platform-support #10887 / rhel-9_platform-support-unix

Reproduction Line:

./gradlew ":x-pack:plugin:core:test" --tests "org.elasticsearch.xpack.core.ilm.SetSingleNodeAllocateStepTests.testPerformActionSomeShardsOnlyOnNewNodes" -Dtests.seed=545ADF029842481E -Dtests.locale=kok-Latn-IN -Dtests.timezone=Asia/Phnom_Penh -Druntime.java=25

Applicable branches:
9.0

Reproduces locally?:
N/A

Failure History:
See dashboard

Failure Message:

java.lang.AssertionError: 
Expected: ("new_node_id_0")
     but: was "old_node_id_3"

Issue Reasons:

• [9.0] 2 failures in test testPerformActionSomeShardsOnlyOnNewNodes (0.5% fail rate in 422 executions)
• [9.0] 2 failures in pipeline elasticsearch-periodic-platform-support (11.8% fail rate in 17 executions)

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

[elasticsearchmachine]

Pinging @elastic/es-data-management (Team:Data Management)

[nielsbauman]

This was already fixed in #135724, but needs to be backported to 9.0 (and perhaps also branches).

[nielsbauman]

Fixed by #136159.