[CI] ClientYamlTestSuiteIT test {yaml=cat.allocation/10_basic/Node forecasts} failing

[elasticsearchmachine]

Build Scans:

• elasticsearch-periodic-platform-support #7362 / almalinux-8_platform-support-unix
• elasticsearch-periodic-platform-support #7264 / ubuntu-2004_platform-support-unix
• elasticsearch-periodic-platform-support #7257 / rhel-7_platform-support-unix

Reproduction Line:

./gradlew ":rest-api-spec:yamlRestTest" --tests "org.elasticsearch.test.rest.ClientYamlTestSuiteIT" -Dtests.method="test {yaml=cat.allocation/10_basic/Node forecasts}" -Dtests.seed=A0F537AA4D8473AA -Dtests.locale=se-NO -Dtests.timezone=Etc/GMT+12 -Druntime.java=24

Applicable branches:
8.x

Reproduces locally?:
N/A

Failure History:
See dashboard

Failure Message:

java.lang.AssertionError: Failure at [cat.allocation/10_basic:292]: field [$body] was expected to match the provided regex but didn't
Expected: ^
  ( [-\w.]+                \s+
    [-\w.]+                \s+
    [-\w.]+                \s+
    [\w]+
    \n
  )+
$
     but: was "test-cluster-0 0 0.0 3.7kb\n"

Issue Reasons:

• [8.x] 3 failures in test test {yaml=cat.allocation/10_basic/Node forecasts} (0.5% fail rate in 597 executions)
• [8.x] 3 failures in pipeline elasticsearch-periodic-platform-support (20.0% fail rate in 15 executions)

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

[elasticsearchmachine]

Pinging @elastic/es-storage-engine (Team:StorageEngine)

[elasticsearchmachine]

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

[elasticsearchmachine]

This has been muted on branch main

Mute Reasons:

• [main] 3 failures in test test {yaml=cat.allocation/10_basic/Node forecasts} (0.4% fail rate in 820 executions)
• [main] 2 failures in pipeline elasticsearch-pull-request (0.9% fail rate in 212 executions)

Build Scans:

• elasticsearch-periodic #7258 / openjdk21_entitlements_true_checkrestcompat_java-matrix
• elasticsearch-pull-request #64581 / rest-compatibility
• elasticsearch-pull-request #64231 / part-1

[nielsbauman]

Duplicate of #125848. I'm keeping both open for now as they're both muted and I don't want to make the test bot angry.