### CI Link

- https://gradle-enterprise.elastic.co/s/tl3jqzmzqyktq (PR branch)
- https://gradle-enterprise.elastic.co/s/6ao6q7f42tsly (main)

### Repro line

./gradlew ':server:test' --tests "org.elasticsearch.index.mapper.vectors.DenseVectorFieldMapperTests.testVectorSimilarity" -Dtests.seed=39343A357A78EC3 -Dtests.locale=zh-CN -Dtests.timezone=Africa/Maseru -Druntime.java=21

### Does it reproduce?

Yes

### Applicable branches

main

### Failure history

_No response_

### Failure excerpt

  2> java.lang.AssertionError: expected:<COSINE> but was:<DOT_PRODUCT>
        at __randomizedtesting.SeedInfo.seed([39343A357A78EC3:75EC84B47EC59CF]:0)
        at org.junit.Assert.fail(Assert.java:88)
        at org.junit.Assert.failNotEquals(Assert.java:834)
        at org.junit.Assert.assertEquals(Assert.java:118)
        at org.junit.Assert.assertEquals(Assert.java:144)
        at org.elasticsearch.index.mapper.vectors.DenseVectorFieldMapperTests.testVectorSimilarity(DenseVectorFieldMapperTests.java:776)
server/src/test/java/org/elasticsearch/index/mapper/vectors/DenseVectorFieldMapperTests.java
public void testDotProductWithInvalidNorm() throws Exception {
        DocumentMapper mapper = createDocumentMapper(
            fieldMapping(
                b -> b.field("type", "dense_vector").field("dims", 3).field("index", true).field("similarity", VectorSimilarity.DOT_PRODUCT)
            )
        );
        float[] vector = { -12.1f, 2.7f, -4 };
        DocumentParsingException e = expectThrows(
            DocumentParsingException.class,
            () -> mapper.parse(source(b -> b.array("field", vector)))
        );
        assertNotNull(e.getCause());
        assertThat(
            e.getCause().getMessage(),
            containsString(
                "The [dot_product] similarity can only be used with unit-length vectors. Preview of invalid vector: [-12.1, 2.7, -4.0]"
            )
        );
        DocumentMapper mapperWithLargerDim = createDocumentMapper(
            fieldMapping(
                b -> b.field("type", "dense_vector").field("dims", 6).field("index", true).field("similarity", VectorSimilarity.DOT_PRODUCT)
            )
        );
        float[] largerVector = { -12.1f, 2.7f, -4, 1.05f, 10.0f, 29.9f };
        e = expectThrows(DocumentParsingException.class, () -> mapperWithLargerDim.parse(source(b -> b.array("field", largerVector))));
        assertNotNull(e.getCause());
        assertThat(
            e.getCause().getMessage(),
            containsString(
                "The [dot_product] similarity can only be used with unit-length vectors. "