[CI] EC2RetriesTests testEC2DiscoveryRetriesOnRateLimiting failing

[elasticsearchmachine]

Build Scans:

• elasticsearch-periodic #4297 / openjdk23_java-matrix
• elasticsearch-periodic #4293 / openjdk23_java-matrix
• elasticsearch-periodic #4289 / openjdk23_java-matrix
• elasticsearch-periodic #4265 / openjdk23_java-matrix
• elasticsearch-periodic #4253 / openjdk23_java-matrix

Reproduction Line:

./gradlew ':plugins:discovery-ec2:test' --tests "org.elasticsearch.discovery.ec2.EC2RetriesTests.testEC2DiscoveryRetriesOnRateLimiting" -Dtests.seed=EF61DF7925AC5190 -Dtests.locale=mdf-Cyrl-RU -Dtests.timezone=Atlantic/Faeroe -Druntime.java=23

Applicable branches:
7.17

Reproduces locally?:
N/A

Failure History:
See dashboard

Failure Message:

java.lang.AssertionError: 
Expected: a collection with size <1>
     but: collection size was <0>

Issue Reasons:

• [7.17] 5 consecutive failures in step openjdk23_java-matrix
• [7.17] 5 failures in test testEC2DiscoveryRetriesOnRateLimiting (1.1% fail rate in 466 executions)
• [7.17] 5 failures in step openjdk23_java-matrix (100.0% fail rate in 5 executions)
• [7.17] 5 failures in pipeline elasticsearch-periodic (41.7% fail rate in 12 executions)

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

[elasticsearchmachine]

Pinging @elastic/es-delivery (Team:Delivery)

[elasticsearchmachine]

Pinging @elastic/es-distributed (Team:Distributed)