ESQL: Don't test field extraction in 8.11

We changed field extraction in ES|QL in 8.12 quite a bit so our tests
would have to be super complex to test a cluster of mixed versions
between 8.11 and `main`. So let's just skip it.

Closes elastic#105837

x-pack/plugin/esql/qa/server/mixed-cluster/src/javaRestTest/java/org/elasticsearch/xpack/esql/qa/mixed/FieldExtractorIT.java

@@ -9,13 +9,11 @@
 
 import com.carrotsearch.randomizedtesting.annotations.ThreadLeakFilters;
 
-import org.apache.lucene.tests.util.LuceneTestCase;
 import org.elasticsearch.test.TestClustersThreadFilter;
 import org.elasticsearch.test.cluster.ElasticsearchCluster;
 import org.elasticsearch.xpack.esql.qa.rest.FieldExtractorTestCase;
 import org.junit.ClassRule;
 
-@LuceneTestCase.AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/105837")
 @ThreadLeakFilters(filters = TestClustersThreadFilter.class)
 public class FieldExtractorIT extends FieldExtractorTestCase {
     @ClassRule

x-pack/plugin/esql/qa/server/src/main/java/org/elasticsearch/xpack/esql/qa/rest/FieldExtractorTestCase.java

@@ -27,6 +27,7 @@
 import org.elasticsearch.xcontent.XContentType;
 import org.elasticsearch.xcontent.json.JsonXContent;
 import org.hamcrest.Matcher;
+import org.junit.Before;
 
 import java.io.IOException;
 import java.math.BigDecimal;
@@ -57,6 +58,14 @@
 public abstract class FieldExtractorTestCase extends ESRestTestCase {
     private static final Logger logger = LogManager.getLogger(FieldExtractorTestCase.class);
 
+    @Before
+    public void notOld() {
+        assumeTrue(
+            "support changed pretty radically in 8.12 so we don't test against 8.11",
+            getCachedNodesVersions().stream().allMatch(v -> Version.fromString(v).onOrAfter(Version.V_8_12_0))
+        );
+    }
+
     public void testTextField() throws IOException {
         textTest().test(randomAlphaOfLength(20));
     }