add test feature

Author: szybia

modules/ingest-common/src/yamlRestTest/resources/rest-api-spec/test/ingest/120_grok.yml

@@ -158,6 +158,9 @@ teardown:
 
 ---
 "Test simulate with invalid GROK pattern":
+  - requires:
+        cluster_features: [ "simulate.ingest.400_on_failure" ]
+        reason: "simulate.ingest returned 500 on failure before"
   - skip:
         features: headers
   - do:

rest-api-spec/src/yamlRestTest/resources/rest-api-spec/test/simulate.ingest/10_basic.yml

@@ -600,6 +600,9 @@ setup:
 
 ---
 "Test bad pipeline substitution":
+  - requires:
+        cluster_features: [ "simulate.ingest.400_on_failure" ]
+        reason: "simulate.ingest returned 500 on failure before"
   - skip:
       features: [headers, allowed_warnings]
 
@@ -751,6 +754,9 @@ setup:
 
 ---
 "Test simulate with pipeline with created_date":
+  - requires:
+        cluster_features: [ "simulate.ingest.400_on_failure" ]
+        reason: "simulate.ingest returned 500 on failure before"
   - requires:
         test_runner_features: capabilities
         capabilities:

server/src/main/java/org/elasticsearch/ingest/IngestFeatures.java

@@ -16,6 +16,8 @@
 import java.util.Set;
 
 public class IngestFeatures implements FeatureSpecification {
+    private static final NodeFeature SIMULATE_INGEST_400_ON_FAILURE = new NodeFeature("simulate.ingest.400_on_failure", true);
+
     @Override
     public Set<NodeFeature> getFeatures() {
         if (DataStream.LOGS_STREAM_FEATURE_FLAG) {
@@ -24,4 +26,9 @@ public Set<NodeFeature> getFeatures() {
             return Set.of();
         }
     }
+
+    @Override
+    public Set<NodeFeature> getTestFeatures() {
+        return Set.of(SIMULATE_INGEST_400_ON_FAILURE);
+    }
 }