### 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
assertArrayEquals("Decoded dense vector values is not equal to the indexed one.", validVector, decodedValues, 0.001f);
    }
    public void testIndexedByteVector() throws Exception {
        VectorSimilarity similarity = RandomPicks.randomFrom(random(), VectorSimilarity.values());
        DocumentMapper mapper = createDocumentMapper(
            fieldMapping(
                b -> b.field("type", "dense_vector")
                    .field("dims", 3)
                    .field("index", true)
                    .field("similarity", similarity)
                    .field("element_type", "byte")
            )
        );
        byte[] vector = { (byte) -1, (byte) 1, (byte) 127 };
        ParsedDocument doc1 = mapper.parse(source(b -> b.array("field", vector)));
        List<IndexableField> fields = doc1.rootDoc().getFields("field");
        assertEquals(1, fields.size());
        assertThat(fields.get(0), instanceOf(KnnByteVectorField.class));
        KnnByteVectorField vectorField = (KnnByteVectorField) fields.get(0);
        vectorField.vectorValue();
        assertArrayEquals(
            "Parsed vector is not equal to original.",
            new byte[] { (byte) -1, (byte) 1, (byte) 127 },
            vectorField.vectorValue()
        );
        assertEquals(
            similarity.vectorSimilarityFunction(IndexVersion.current(), ElementType.BYTE),
            vectorField.fieldType().vectorSimilarityFunction()
        );
    }