### 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
public LongFieldScript.LeafFactory newFactory(
                            String fieldName,
                            Map<String, Object> params,
                            SearchLookup searchLookup,
                            OnScriptError onScriptError
                        ) {
                            return ctx -> new LongFieldScript(fieldName, params, searchLookup, onScriptError, ctx) {
                                @Override
                                public void execute() {
                                    try {
                                        assertTrue(scriptPermits.tryAcquire(1, TimeUnit.MINUTES));
                                    } catch (Exception e) {
                                        throw new AssertionError(e);
                                    }
                                    LOGGER.debug("--> emitting value");
                                    emit(1);
                                }
                            };
                        }
                    };
                }
                @Override
                public Set<ScriptContext<?>> getSupportedContexts() {
                    return Set.of(LongFieldScript.CONTEXT);
                }
            };
        }
    }
}