The test `ConvertProcessorTests` contain switch statements with branches that will never execute. The tests use a `between(x, y)` switch expression, but there are `case` values that are outside the randomised range. We need to fix these before #88739 can be merged. By "fix", I mean either remove the spurious cases, or if we actually want them, then extend the randomized range.
modules/ingest-common/src/test/java/org/elasticsearch/ingest/common/ConvertProcessorTests.java
ingestDocument.setFieldValue(fieldName, validIpV6);
        Processor processor = new ConvertProcessor(randomAlphaOfLength(10), null, fieldName, targetField, Type.IP, false);
        processor.execute(ingestDocument);
        assertThat(ingestDocument.getFieldValue(targetField, String.class), equalTo(validIpV6));
        
        IngestDocument ingestDocument2 = RandomDocumentPicks.randomIngestDocument(random(), new HashMap<>());
        fieldName = RandomDocumentPicks.randomFieldName(random());
        targetField = randomValueOtherThan(fieldName, () -> RandomDocumentPicks.randomFieldName(random()));
        String invalidIpV6 = "2001:db8:3333:4444:5555:6666:7777:88888";
        ingestDocument2.setFieldValue(fieldName, invalidIpV6);
        Processor processor2 = new ConvertProcessor(randomAlphaOfLength(10), null, fieldName, targetField, Type.IP, false);
        IllegalArgumentException e = expectThrows(IllegalArgumentException.class, () -> processor2.execute(ingestDocument2));
        assertThat(e.getMessage(), containsString("'" + invalidIpV6 + "' is not an IP string literal."));
    }
    public void testConvertIpList() throws Exception {
        IngestDocument ingestDocument = RandomDocumentPicks.randomIngestDocument(random());
        int numItems = randomIntBetween(1, 10);
        List<String> fieldValue = new ArrayList<>();
        List<String> expectedList = new ArrayList<>();
        for (int j = 0; j < numItems; j++) {
            String value;
            if (randomBoolean()) {
                
                value = "192.168.1." + randomIntBetween(0, 255);
            } else {
                
                value = "2001:db8:3333:4444:5555:6666:7777:" + Long.toString(randomLongBetween(0, 65535), 16);
            }
            fieldValue.add(value);
            expectedList.add(value);