HSEARCH-5236 Test against latest Elasticsearch 8.15.1

Bumps the search-backend-containers group in /build/container/search-backend with 1 update: elastic/elasticsearch.

Updates `elastic/elasticsearch` from 8.15.0 to 8.15.1

---
updated-dependencies:
- dependency-name: elastic/elasticsearch
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: search-backend-containers
...

Signed-off-by: dependabot[bot] <[email protected]>

Jenkinsfile

@@ -267,7 +267,7 @@ stage('Configure') {
 					new LocalElasticsearchBuildEnvironment(version: '8.12.2', condition: TestCondition.ON_DEMAND),
 					new LocalElasticsearchBuildEnvironment(version: '8.13.4', condition: TestCondition.ON_DEMAND),
 					new LocalElasticsearchBuildEnvironment(version: '8.14.3', condition: TestCondition.ON_DEMAND),
-					new LocalElasticsearchBuildEnvironment(version: '8.15.0', condition: TestCondition.BEFORE_MERGE, isDefault: true),
+					new LocalElasticsearchBuildEnvironment(version: '8.15.1', condition: TestCondition.BEFORE_MERGE, isDefault: true),
 					// IMPORTANT: Make sure to update the documentation for any newly supported Elasticsearch versions
 					//            See version.org.elasticsearch.compatible.expected.text
 					//            and version.org.elasticsearch.compatible.regularly-tested.text in POMs.

build/container/search-backend/elastic.Dockerfile

@@ -5,4 +5,4 @@
 #  * update `version.org.elasticsearch.latest` property in a POM file.
 #  * update the tags for 'elasticsearch-current' and 'elasticsearch-next' builds in ci/dependency-update/Jenkinsfile
 #
-FROM docker.io/elastic/elasticsearch:8.15.0
+FROM docker.io/elastic/elasticsearch:8.15.1

pom.xml

@@ -377,7 +377,7 @@
 
         <!-- Container images for various integration tests -->
         <!-- The latest version of Elasticsearch tested against by default -->
-        <version.org.elasticsearch.latest>8.15.0</version.org.elasticsearch.latest>
+        <version.org.elasticsearch.latest>8.15.1</version.org.elasticsearch.latest>
         <test.elasticsearch.version></test.elasticsearch.version>
         <test.elasticsearch.distribution>elastic</test.elasticsearch.distribution>