Fix categorize csv test (elastic#113089)

* Move CATEGORIZE from EsqlFeatures to EsqlCapabilities

* Make CATEGORIZE csv test deterministic

* Unmute categorize test

* spotless

* Deterministic categorize csv test with category IDs

x-pack/plugin/esql/qa/testFixtures/src/main/resources/categorize.csv-spec

@@ -2,8 +2,9 @@ categorize
 required_capability: categorize
 
 FROM sample_data
- | STATS count=COUNT(), values=VALUES(message) BY category=CATEGORIZE(message)
- | SORT count DESC, category ASC
+ | SORT message ASC
+ | STATS count=COUNT(), values=MV_SORT(VALUES(message)) BY category=CATEGORIZE(message)
+ | SORT category
 ;
 
 count:long | values:keyword | category:integer

x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/action/EsqlCapabilities.java

@@ -304,7 +304,12 @@ public enum Cap {
  /**
  * Support explicit casting from string literal to DATE_PERIOD or TIME_DURATION.
  */
- CAST_STRING_LITERAL_TO_TEMPORAL_AMOUNT;
+ CAST_STRING_LITERAL_TO_TEMPORAL_AMOUNT,
+
+ /**
+ * Supported the text categorization function "CATEGORIZE".
+ */
+ CATEGORIZE(true);
 
  private final boolean snapshotOnly;
  private final FeatureFlag featureFlag;

x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/plugin/EsqlFeatures.java

@@ -179,14 +179,9 @@ public class EsqlFeatures implements FeatureSpecification {
  */
  public static final NodeFeature RESOLVE_FIELDS_API = new NodeFeature("esql.resolve_fields_api");
 
- /**
- * Support categorize
- */
- public static final NodeFeature CATEGORIZE = new NodeFeature("esql.categorize");
-
  private Set<NodeFeature> snapshotBuildFeatures() {
  assert Build.current().isSnapshot() : Build.current();
- return Set.of(METRICS_SYNTAX, CATEGORIZE);
+ return Set.of(METRICS_SYNTAX);
  }
 
  @Override