HSEARCH-5438 Add Elasticsearch 9.1.0 compatibility

Author: marko-bekhta

backend/elasticsearch/src/main/java/org/hibernate/search/backend/elasticsearch/dialect/impl/ElasticsearchDialectFactory.java

@@ -213,7 +213,7 @@ else if ( minor == 0 ) {
 	}
 
 	private ElasticsearchProtocolDialect createProtocolDialectElasticV9(ElasticsearchVersion version, int minor) {
-		if ( minor > 0 ) {
+		if ( minor > 1 ) {
 			VersionLog.INSTANCE.unknownElasticsearchVersion( version );
 		}
 		return new Elasticsearch81ProtocolDialect();

backend/elasticsearch/src/test/java/org/hibernate/search/backend/elasticsearch/dialect/impl/ElasticsearchDialectFactoryTest.java

@@ -317,10 +317,18 @@ public static List<? extends Arguments> params() {
 						ElasticsearchDistributionName.ELASTIC, "9.0.0", "9.0.0",
 						Elasticsearch814ModelDialect.class, Elasticsearch81ProtocolDialect.class
 				),
-				successWithWarning(
+				success(
+						ElasticsearchDistributionName.ELASTIC, "9.1", "9.1.0",
+						Elasticsearch814ModelDialect.class, Elasticsearch81ProtocolDialect.class
+				),
+				success(
 						ElasticsearchDistributionName.ELASTIC, "9.1.0", "9.1.0",
 						Elasticsearch814ModelDialect.class, Elasticsearch81ProtocolDialect.class
 				),
+				successWithWarning(
+						ElasticsearchDistributionName.ELASTIC, "9.2.0", "9.2.0",
+						Elasticsearch814ModelDialect.class, Elasticsearch81ProtocolDialect.class
+				),
 				success(
 						ElasticsearchDistributionName.OPENSEARCH, "1", "1.3.1",
 						OpenSearch1ModelDialect.class, Elasticsearch70ProtocolDialect.class