[CI] RemoteClusterSecurityReloadCredentialsRestIT testUpgradeFromRcs1 failing

[elasticsearchmachine]

Build Scans:

• elasticsearch-periodic #4896 / openjdk17_checkpart4_java-fips-matrix
• elasticsearch-periodic #4876 / openjdk17_checkpart4_java-fips-matrix

Reproduction Line:

./gradlew ":x-pack:plugin:security:qa:multi-cluster:javaRestTest" --tests "org.elasticsearch.xpack.remotecluster.RemoteClusterSecurityReloadCredentialsRestIT.testUpgradeFromRcs1" -Dtests.seed=934C9618D16153A1 -Dtests.locale=en-DE -Dtests.timezone=America/Fortaleza -Druntime.java=17 -Dtests.fips.enabled=true

Applicable branches: 8.x

Reproduces locally?: N/A

Failure History: See dashboard&_a=(controlGroupState:(initialChildControlState:('0c0c9cb8-ccd2-45c6-9b13-96bac4abc542':(dataViewId:fbbdc689-be23-4b3d-8057-aa402e9ed0c5,fieldName:task.keyword,order:0,selectedOptions:!(),title:'GradleTask',type:optionsListControl),'4e6ad9d6-6fdc-4fcc-bf1a-aa6ca79e0850':(dataViewId:fbbdc689-be23-4b3d-8057-aa402e9ed0c5,fieldName:className.keyword,order:1,selectedOptions:!(org.elasticsearch.xpack.remotecluster.RemoteClusterSecurityReloadCredentialsRestIT),title:'Suite',type:optionsListControl),'144933da-5c1b-4257-a969-7f43455a7901':(dataViewId:fbbdc689-be23-4b3d-8057-aa402e9ed0c5,fieldName:name.keyword,order:2,selectedOptions:!(testUpgradeFromRcs1),title:'Test',type:optionsListControl)))))

Failure Message:

java.lang.Exception: Test abandoned because suite timeout was reached.

Issue Reasons:

• [8.x] 2 failures in test testUpgradeFromRcs1 (1.7% fail rate in 121 executions)
• [8.x] 2 failures in step openjdk17_checkpart4_java-fips-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/es-security (Team:Security)