[CI] Ec2DiscoveryTests testFilterByMultipleTags failing

[elasticsearchmachine]

Build Scans:

• elasticsearch-periodic-platform-support #7105 / ubuntu-2004-aarch64_checkpart1_platform-support-arm
• elasticsearch-pull-request #63448 / part-1
• elasticsearch-pull-request #63442 / part-1
• elasticsearch-pull-request #63427 / part-1
• elasticsearch-pull-request #63406 / part-1
• elasticsearch-pull-request #63323 / part-1
• elasticsearch-intake #20290 / part1

Reproduction Line:

./gradlew ":plugins:discovery-ec2:test" --tests "org.elasticsearch.discovery.ec2.Ec2DiscoveryTests.testFilterByMultipleTags" -Dtests.seed=AA08E27CA8A120C8 -Dtests.locale=ar-Arab-EG -Dtests.timezone=Pacific/Yap -Druntime.java=23

Applicable branches:
main

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:

• [main] 7 failures in test testFilterByMultipleTags (3.2% fail rate in 220 executions)
• [main] 5 failures in step part-1 (5.2% fail rate in 97 executions)
• [main] 5 failures in pipeline elasticsearch-pull-request (5.3% fail rate in 95 executions)

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

[elasticsearchmachine]

This has been muted on branch 8.x

Mute Reasons:

• [8.x] 3 failures in test testFilterByMultipleTags (2.1% fail rate in 143 executions)

Build Scans:

• elasticsearch-periodic-platform-support #7103 / rocky-9_platform-support-unix
• elasticsearch-pull-request #63413 / part-1
• elasticsearch-intake #20313 / part1

[elasticsearchmachine]

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

[nicktindall]

Also seemingly caused by aws/aws-sdk-java-v2#5968 (I checked one break and it was locale=sd...