Just got a bunch of instances of this suite timing out all on Windows agents. Could be a coincidence but seems unlikely.

**Build scan:**
https://gradle-enterprise.elastic.co/s/rvfpi7upehqjk/tests/:x-pack:plugin:esql:test/org.elasticsearch.xpack.esql.expression.function.scalar.nulls.CoalesceTests
**Reproduction line:**
```
null
```

**Applicable branches:**
main

**Reproduces locally?:**
Didn't try

**Failure history:**
https://gradle-enterprise.elastic.co/scans/tests?tests.container=org.elasticsearch.xpack.esql.expression.function.scalar.nulls.CoalesceTests&tests.test=classMethod
**Failure excerpt:**
```
java.lang.Exception: Suite timeout exceeded (>= 2400000 msec).

  at __randomizedtesting.SeedInfo.seed([546AEE28130887AC]:0)

```
x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/expression/function/AbstractFunctionTestCase.java
TestCaseSupplier.TypedData od = oc.getData().get(i);
                                if (i == finalNullPosition) {
                                    return new TestCaseSupplier.TypedData(null, DataTypes.NULL, od.name());
                                }
                                return od;
                            }).toList();
                            return new TestCaseSupplier.TestCase(
                                data,
                                "LiteralsEvaluator[lit=null]",
                                entirelyNullPreservesType == false && oc.getData().size() == 1 ? DataTypes.NULL : oc.expectedType,
                                nullValue(),
                                null,
                                oc.getExpectedTypeError()
                            );
                        }));
                    }
                }
            }
        }
        return suppliers;
    }
    /**
     * Adds test cases containing unsupported parameter types that assert
     * that they throw type errors.
     */
    protected static List<TestCaseSupplier> errorsForCasesWithoutExamples(List<TestCaseSupplier> testCaseSuppliers) {
        for (TestCaseSupplier s : testCaseSuppliers) {
            if (s.types() == null) {
                throw new IllegalArgumentException("types required");
            }