ES|QL: fix generative tests (#131071) (#132435)

excluding dense vector fields for now, since they are not supported by most commands

(cherry picked from commit 0b06d9f)

# Conflicts:
#	muted-tests.yml

Co-authored-by: Luigi Dell'Aquila <[email protected]>

Author: alex-spies

muted-tests.yml

@@ -395,14 +395,8 @@ tests:
 - class: org.elasticsearch.cluster.metadata.ComposableIndexTemplateTests
   method: testMergeEmptyMappingsIntoTemplateWithNonEmptySettings
   issue: https://github.com/elastic/elasticsearch/issues/130050
-- class: org.elasticsearch.xpack.esql.qa.multi_node.GenerativeIT
-  method: test
-  issue: https://github.com/elastic/elasticsearch/issues/130067
 - class: geoip.GeoIpMultiProjectIT
   issue: https://github.com/elastic/elasticsearch/issues/130073
-- class: org.elasticsearch.xpack.esql.qa.single_node.GenerativeIT
-  method: test
-  issue: https://github.com/elastic/elasticsearch/issues/130067
 - class: org.elasticsearch.search.SearchWithRejectionsIT
   method: testOpenContextsAfterRejections
   issue: https://github.com/elastic/elasticsearch/issues/130821

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

@@ -288,7 +288,9 @@ public static boolean fieldCanBeUsed(Column field) {
         // https://github.com/elastic/elasticsearch/issues/121741
         field.name().equals("<all-fields-projected>")
             // this is a known pathological case, no need to test it for now
-            || field.name().equals("<no-fields>")) == false;
+            || field.name().equals("<no-fields>")
+            // no dense vectors for now, they are not supported in most commands
+            || field.type().contains("vector")) == false;
     }
 
     public static String unquote(String colName) {