adding node feature for yaml tests

Author: Samiul-TheSoccerFan

x-pack/plugin/inference/src/main/java/org/elasticsearch/xpack/inference/InferenceFeatures.java

@@ -15,6 +15,7 @@
 
 import java.util.Set;
 
+import static org.elasticsearch.xpack.inference.mapper.SemanticTextFieldMapper.SEMANTIC_TEXT_SUB_FIELDS_EXCLUDE_FROM_FIELD_CAPS;
 import static org.elasticsearch.xpack.inference.mapper.SemanticTextFieldMapper.SEMANTIC_TEXT_SUPPORT_CHUNKING_CONFIG;
 import static org.elasticsearch.xpack.inference.queries.SemanticKnnVectorQueryRewriteInterceptor.SEMANTIC_KNN_FILTER_FIX;
 import static org.elasticsearch.xpack.inference.queries.SemanticKnnVectorQueryRewriteInterceptor.SEMANTIC_KNN_VECTOR_QUERY_REWRITE_INTERCEPTION_SUPPORTED;
@@ -57,7 +58,8 @@ public Set<NodeFeature> getTestFeatures() {
             SemanticTextFieldMapper.SEMANTIC_TEXT_BIT_VECTOR_SUPPORT,
             SemanticTextFieldMapper.SEMANTIC_TEXT_HANDLE_EMPTY_INPUT,
             TEST_RULE_RETRIEVER_WITH_INDICES_THAT_DONT_RETURN_RANK_DOCS,
-            SEMANTIC_TEXT_SUPPORT_CHUNKING_CONFIG
+            SEMANTIC_TEXT_SUPPORT_CHUNKING_CONFIG,
+            SEMANTIC_TEXT_SUB_FIELDS_EXCLUDE_FROM_FIELD_CAPS
         );
     }
 }

x-pack/plugin/inference/src/main/java/org/elasticsearch/xpack/inference/mapper/SemanticTextFieldMapper.java

@@ -132,6 +132,9 @@ public class SemanticTextFieldMapper extends FieldMapper implements InferenceFie
     public static final NodeFeature SEMANTIC_TEXT_SKIP_INFERENCE_FIELDS = new NodeFeature("semantic_text.skip_inference_fields");
     public static final NodeFeature SEMANTIC_TEXT_BIT_VECTOR_SUPPORT = new NodeFeature("semantic_text.bit_vector_support");
     public static final NodeFeature SEMANTIC_TEXT_SUPPORT_CHUNKING_CONFIG = new NodeFeature("semantic_text.support_chunking_config");
+    public static final NodeFeature SEMANTIC_TEXT_SUB_FIELDS_EXCLUDE_FROM_FIELD_CAPS = new NodeFeature(
+        "semantic_text.exclude_sub_fields_from_field_caps"
+    );
 
     public static final String CONTENT_TYPE = "semantic_text";
     public static final String DEFAULT_ELSER_2_INFERENCE_ID = DEFAULT_ELSER_ID;

x-pack/plugin/inference/src/yamlRestTest/resources/rest-api-spec/test/inference/10_semantic_text_field_mapping.yml

@@ -363,8 +363,8 @@ setup:
 ---
 "Field caps exclude chunks and embedding fields":
   - requires:
-      cluster_features: "gte_v8.16.0"
-      reason: field_caps support for semantic_text added in 8.16.0
+      cluster_features: "semantic_text.exclude_sub_fields_from_field_caps"
+      reason: field caps api exclude semantic_text subfields from 9.1.0
 
   - do:
       field_caps:

x-pack/plugin/inference/src/yamlRestTest/resources/rest-api-spec/test/inference/10_semantic_text_field_mapping_bwc.yml

@@ -310,8 +310,8 @@ setup:
 ---
 "Field caps exclude chunks embedding and text fields":
   - requires:
-      cluster_features: "gte_v8.16.0"
-      reason: field_caps support for semantic_text added in 8.16.0
+      cluster_features: "semantic_text.exclude_sub_fields_from_field_caps"
+      reason: field caps api exclude semantic_text subfields from 9.1.0
 
   - do:
       field_caps: