### CI Link

https://gradle-enterprise.elastic.co/s/sa7kgcpbjsuyo

### Repro line

./gradlew ':x-pack:plugin:esql:internalClusterTest' --tests "org.elasticsearch.xpack.esql.action.EsqlActionTaskIT.testCancelRead" -Dtests.seed=A10FD59C7183AD95 -Dbuild.snapshot=false -Dtests.jvm.argline="-Dbuild.snapshot=false" -Dtests.locale=ga-IE -Dtests.timezone=Europe/Stockholm -Druntime.java=20

### Does it reproduce?

No

### Applicable branches

main

### Failure history

_No response_

### Failure excerpt

```
org.elasticsearch.xpack.esql.action.EsqlActionTaskIT > testCancelRead FAILED
    java.lang.AssertionError: 
    Expected: a collection with size <2>
         but: collection size was <0>
        at __randomizedtesting.SeedInfo.seed([A10FD59C7183AD95:34226718C99014F4]:0)
        at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:18)
        at org.junit.Assert.assertThat(Assert.java:956)
        at org.junit.Assert.assertThat(Assert.java:923)
        at org.elasticsearch.xpack.esql.action.EsqlActionTaskIT.lambda$getTasksStarting$2(EsqlActionTaskIT.java:229)
        at org.elasticsearch.test.ESTestCase.assertBusy(ESTestCase.java:1196)
        at org.elasticsearch.test.ESTestCase.assertBusy(ESTestCase.java:1169)
        at org.elasticsearch.xpack.esql.action.EsqlActionTaskIT.getTasksStarting(EsqlActionTaskIT.java:221)
        at org.elasticsearch.xpack.esql.action.EsqlActionTaskIT.testCancelRead(EsqlActionTaskIT.java:167)
```
x-pack/plugin/esql/src/internalClusterTest/java/org/elasticsearch/xpack/esql/action/EsqlActionTaskIT.java
client().admin()
                    .cluster()
                    .prepareListTasks()
                    .setActions(EsqlQueryAction.NAME, DriverTaskRunner.ACTION_NAME)
                    .setDetailed(true)
                    .get()
                    .getTasks(),
                emptyIterable()
            )
        );
    }
    private static final Semaphore scriptPermits = new Semaphore(0);
    public static class PausableFieldPlugin extends Plugin implements ScriptPlugin {
        @Override
        public ScriptEngine getScriptEngine(Settings settings, Collection<ScriptContext<?>> contexts) {
            return new ScriptEngine() {
                @Override
                public String getType() {
                    return "pause";
                }
                @Override
                @SuppressWarnings("unchecked")
                public <FactoryType> FactoryType compile(
                    String name,
                    String code,
                    ScriptContext<FactoryType> context,
                    Map<String, String> params
                ) {
                    return (FactoryType) new LongFieldScript.Factory() {
                        @Override