DeprecationHttpIT test testUniqueDeprecationResponsesMergedTogether failing

[smalyshev]

DeprecationHttpIT testUniqueDeprecationResponsesMergedTogether failing

Build Scans:

• Failed CI Run

Reproduction Line:

./gradlew ":x-pack:plugin:deprecation:qa:rest:javaRestTest" --tests "org.elasticsearch.xpack.deprecation.DeprecationHttpIT.testUniqueDeprecationResponsesMergedTogether" -Dtests.seed=8685B2DE0EAD9729 -Dtests.locale=gl -Dtests.timezone=America/El_Salvador -Druntime.java=24

Failure Message:

org.elasticsearch.client.ResponseException: method [PUT], host [http://[::1]:45509], URI [test0/0], status line [HTTP/1.1 400 Bad Request] 
{"error":"no handler found for uri [test0/0] and method [PUT]"} 

Note:
This issue was created from stale AwaitsFix test. See #132306 for more details.

[elasticsearchmachine]

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

[mosche]

this is testing something unsupported (see #19222), I'll remove the test