SearchServiceTests.testIsParallelCollectionSupportedForResults fails intermittently

```
12:37:10 org.elasticsearch.search.SearchServiceTests > testIsParallelCollectionSupportedForResults FAILED
12:37:10     java.lang.AssertionError
12:37:10         at __randomizedtesting.SeedInfo.seed([4140C168DE8FB0BB:771A78D5E4B36180]:0)
12:37:10         at org.junit.Assert.fail(Assert.java:86)
12:37:10         at org.junit.Assert.assertTrue(Assert.java:41)
12:37:10         at org.junit.Assert.assertFalse(Assert.java:64)
12:37:10         at org.junit.Assert.assertFalse(Assert.java:74)
12:37:10         at org.elasticsearch.search.SearchServiceTests.testIsParallelCollectionSupportedForResults(SearchServiceTests.java:2096)
```

```
./gradlew ':server:test' --tests "org.elasticsearch.search.SearchServiceTests.testIsParallelCollectionSupportedForResults" -Dtests.seed=4140C168DE8FB0BB -Dtests.locale=es-SV -Dtests.timezone=Africa/Banjul -Druntime.java=20
```
server/src/test/java/org/elasticsearch/search/SearchServiceTests.java
@Override
        public void onIndexModule(IndexModule indexModule) {
            indexModule.setReaderWrapper(service -> SearchServiceTests::apply);
        }
    }
    @Before
    public void resetCount() {
        numWrapInvocations = new AtomicInteger(0);
    }
    private static AtomicInteger numWrapInvocations = new AtomicInteger(0);
    private static DirectoryReader apply(DirectoryReader directoryReader) throws IOException {
        numWrapInvocations.incrementAndGet();
        return new FilterDirectoryReader(directoryReader, new FilterDirectoryReader.SubReaderWrapper() {
            @Override
            public LeafReader wrap(LeafReader reader) {
                return reader;
            }
        }) {
            @Override
            protected DirectoryReader doWrapDirectoryReader(DirectoryReader in) throws IOException {
                return in;
            }
            @Override
            public CacheHelper getReaderCacheHelper() {
                return directoryReader.getReaderCacheHelper();
            }
        };
    }
    public static class CustomScriptPlugin extends MockScriptPlugin {