Test search/160_exists_query fails

[mayya-sharipova]

Different tests in: search/160_exists_query failed 4 times within the last 3 days.
Doesn't reproduce for me.

One of the failures:
./gradlew :qa:smoke-test-multinode:integTestRunner --tests "org.elasticsearch.smoketest.SmokeTestMultiNodeClientYamlTestSuiteIT.test {yaml=search/160_exists_query/Test exists query on unmapped boolean field}"
-Dtests.seed=DBFD63CBEAAA3881
-Dtests.security.manager=true
-Dtests.locale=bs-Cyrl
-Dtests.timezone=America/Edmonton
-Dcompiler.java=12
-Druntime.java=11

Log: https://elasticsearch-ci.elastic.co/job/elastic+elasticsearch+master+multijob+fast+part2/687/console
Build Scans: https://gradle-enterprise.elastic.co/s/szzo266jtkibm

Stack trace:
Caused by: java.lang.AssertionError: expected [2xx] status code but api [indices.create] returned [400 Bad Request] [{"error":{"root_cause":[{"type":"resource_already_exists_exception","reason":"index [test/1U9nRH_AQUuf9dlIDGsWrQ] already exists"

I don't see any obvious cause of this test failure. May be we need to simplify test setup.
In test setup section we create and populate a lot of indexes not even needed for each test. May be should simplify tests in160_exists_query and create indexes explicitly for each individual test.

---

Other failures:
REPRODUCE WITH: ./gradlew :qa:mixed-cluster:v8.0.0#mixedClusterTestRunner --tests "org.elasticsearch.backwards.MixedClusterClientYamlTestSuiteIT.test {p0=search/160_exists_query/Test exists query on unmapped long field}"
-Dtests.seed=20841EF407320797
-Dtests.security.manager=true
-Dtests.locale=wo-SN
-Dtests.timezone=Etc/GMT+4
-Dcompiler.java=12
-Druntime.java=11

Log : https://elasticsearch-ci.elastic.co/job/elastic+elasticsearch+master+multijob-unix-compatibility/os=centos-6&&immutable/203/console
Build Scans: https://gradle-enterprise.elastic.co/s/cor3kexwy5wni

./gradlew :qa:smoke-test-multinode:integTestRunner --tests "org.elasticsearch.smoketest.SmokeTestMultiNodeClientYamlTestSuiteIT.test {yaml=search/160_exists_query/Test exists query on mapped byte field}"
-Dtests.seed=ABB917CFF8F733BB
-Dtests.security.manager=true
-Dtests.locale=fr-MR
-Dtests.timezone=America/Juneau
-Dcompiler.java=12
-Druntime.java=11

Log: https://elasticsearch-ci.elastic.co/job/elastic+elasticsearch+master+multijob+fast+part2/737/console
Build Scans: https://gradle-enterprise.elastic.co/s/uozrajje627bg

[elasticmachine]

Pinging @elastic/es-search

[mayya-sharipova]

Looks like related to #45605

[elasticmachine]

Pinging @elastic/es-core-infra

[alpar-t]

Closing as a duplicate of #46091,