Upgrade to Elasticsearch Client 8.9.0

Closes gh-36886

Author: wilkinsona

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/elasticsearch/ElasticsearchClientConfigurations.java

@@ -22,7 +22,7 @@
 import co.elastic.clients.json.jackson.JacksonJsonpMapper;
 import co.elastic.clients.json.jsonb.JsonbJsonpMapper;
 import co.elastic.clients.transport.ElasticsearchTransport;
-import co.elastic.clients.transport.TransportOptions;
+import co.elastic.clients.transport.rest_client.RestClientOptions;
 import co.elastic.clients.transport.rest_client.RestClientTransport;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import jakarta.json.bind.Jsonb;
@@ -90,8 +90,8 @@ static class ElasticsearchTransportConfiguration {
 
 		@Bean
 		RestClientTransport restClientTransport(RestClient restClient, JsonpMapper jsonMapper,
-				ObjectProvider<TransportOptions> transportOptions) {
-			return new RestClientTransport(restClient, jsonMapper, transportOptions.getIfAvailable());
+				ObjectProvider<RestClientOptions> restClientOptions) {
+			return new RestClientTransport(restClient, jsonMapper, restClientOptions.getIfAvailable());
 		}
 
 	}

spring-boot-project/spring-boot-dependencies/build.gradle

@@ -262,7 +262,7 @@ bom {
 			]
 		}
 	}
-	library("Elasticsearch Client", "8.8.2") {
+	library("Elasticsearch Client", "8.9.0") {
 		group("org.elasticsearch.client") {
 			modules = [
 				"elasticsearch-rest-client" {

spring-boot-project/spring-boot-docs/src/docs/asciidoc/data/nosql.adoc

@@ -330,7 +330,7 @@ If you have `co.elastic.clients:elasticsearch-java` on the classpath, Spring Boo
 
 The `ElasticsearchClient` uses a transport that depends upon the previously described `RestClient`.
 Therefore, the properties described previously can be used to configure the `ElasticsearchClient`.
-Furthermore, you can define a `TransportOptions` bean to take further control of the behavior of the transport.
+Furthermore, you can define a `RestClientOptions` bean to take further control of the behavior of the transport.
 
 
 
@@ -341,7 +341,7 @@ If you have Spring Data Elasticsearch and Reactor on the classpath, Spring Boot
 
 The `ReactiveElasticsearchclient` uses a transport that depends upon the previously described `RestClient`.
 Therefore, the properties described previously can be used to configure the `ReactiveElasticsearchClient`.
-Furthermore, you can define a `TransportOptions` bean to take further control of the behavior of the transport.
+Furthermore, you can define a `RestClientOptions` bean to take further control of the behavior of the transport.