Temporarily depend on old low-level Elasticsearch client

This works around spring-projects/spring-data-elasticsearch#3144.

See gh-46061

Author: wilkinsona

module/spring-boot-data-elasticsearch/build.gradle

@@ -35,6 +35,8 @@ dependencies {
 	optional(project(":module:spring-boot-health"))
 	optional(project(":module:spring-boot-reactor"))
 
+	runtimeOnly("org.elasticsearch.client:elasticsearch-rest-client")
+
 	dockerTestImplementation(project(":core:spring-boot-test"))
 	dockerTestImplementation(project(":test-support:spring-boot-docker-test-support"))
 	dockerTestImplementation(testFixtures(project(":core:spring-boot-autoconfigure")))

platform/spring-boot-dependencies/build.gradle

@@ -365,6 +365,11 @@ bom {
 				managedBy "Spring Data Bom"
 			}
 		}
+		group("org.elasticsearch.client") {
+			modules = [
+				"elasticsearch-rest-client"
+			]
+		}
 		group("co.elastic.clients") {
 			modules = [
 				"elasticsearch-java"