[CI] FilesEntitlementsValidationTests testValidationFailForWrite failing

[elasticsearchmachine]

Build Scans:

• elasticsearch-periodic #8275 / openjdk23_checkpart1_java-matrix
• elasticsearch-periodic #8275 / openjdk21_checkpart1_java-fips-matrix
• elasticsearch-periodic #8275 / openjdk21_checkpart1_java-matrix
• elasticsearch-periodic #8269 / openjdk23_checkpart1_java-matrix
• elasticsearch-periodic #8269 / openjdk21_checkpart1_java-fips-matrix
• elasticsearch-periodic #8269 / openjdk21_checkpart1_java-matrix
• elasticsearch-periodic #8263 / openjdk21_checkpart1_java-matrix
• elasticsearch-periodic #8263 / openjdk23_checkpart1_java-matrix
• elasticsearch-periodic #8263 / openjdk21_checkpart1_java-fips-matrix
• elasticsearch-periodic #8257 / openjdk21_checkpart1_java-matrix

Reproduction Line:

./gradlew ":libs:entitlement:test" --tests "org.elasticsearch.entitlement.initialization.FilesEntitlementsValidationTests.testValidationPass" -Dtests.seed=EB72F4E78AC2CE79 -Dtests.locale=vai-Vaii -Dtests.timezone=America/Tortola -Druntime.java=21 -Dtests.fips.enabled=true

Applicable branches:
9.0

Reproduces locally?:
N/A

Failure History:
See dashboard

Failure Message:

java.security.AccessControlException: access denied ("java.io.FilePermission" "/opt/buildkite-agent/.java/openjdk21/conf" "read")

Issue Reasons:

• [9.0] 3 consecutive failures in test testValidationFailForWrite
• [9.0] 22 consecutive failures in step openjdk23_checkpart1_java-matrix
• [9.0] 22 consecutive failures in step openjdk21_checkpart1_java-fips-matrix
• [9.0] 22 consecutive failures in step openjdk21_checkpart1_java-matrix
• [9.0] 66 failures in test testValidationFailForWrite (12.5% fail rate in 527 executions)
• [9.0] 22 failures in step openjdk23_checkpart1_java-matrix (100.0% fail rate in 22 executions)
• [9.0] 22 failures in step openjdk21_checkpart1_java-fips-matrix (100.0% fail rate in 22 executions)
• [9.0] 22 failures in step openjdk21_checkpart1_java-matrix (100.0% fail rate in 22 executions)
• [9.0] 22 failures in pipeline elasticsearch-periodic (100.0% fail rate in 22 executions)

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

[elasticsearchmachine]

Pinging @elastic/es-core-infra (Team:Core/Infra)