SearchAsyncActionTests testLimitConcurrentShardRequests fails

[cbuescher]

This fails reproducibly for me on master (8a02bac) currently:

 ./gradlew :server:unitTest -Dtests.seed=C5E677D7ADE5C0B6 -Dtests.class=org.elasticsearch.action.search.SearchAsyncActionTests -Dtests.method="testLimitConcurrentShardRequests" -Dtests.security.manager=true -Dtests.locale=en-PH -Dtests.timezone=Europe/Astrakhan -Dcompiler.java=11 -Druntime.java=8

  > Throwable #1: java.lang.AssertionError
   >    at __randomizedtesting.SeedInfo.seed([C5E677D7ADE5C0B6:6BDC65747CE74818]:0)
   >    at org.elasticsearch.action.search.SearchAsyncActionTests.testLimitConcurrentShardRequests(SearchAsyncActionTests.java:253)

Might be related to #36221 which was recently closed by the fix might have side effects? The error looks different at least. Any ideas @javanna?

[elasticmachine]

Pinging @elastic/es-search

[cbuescher]

fyi. also fails on CI, e.g. here https://elasticsearch-ci.elastic.co/job/elastic+elasticsearch+master+intake/1019/console