GH-5744: Fix missing jackson dependency in elasticsearch modules

ElasticsearchIndex, ElasticsearchDataStructure and
ElasticsearchNamespaceStore use Jackson 2 types (ObjectMapper, JsonNode,
ObjectNode, TypeReference) that
were previously reaching the compile classpath only transitively via
elasticsearch-java. Add an explicit jackson-databind dependency to both
rdf4j-sail-elasticsearch and rdf4j-sail-elasticsearch-store so the
compile dependency is declared rather than assumed

Author: aschwarte10

core/sail/elasticsearch-store/pom.xml

@@ -14,6 +14,10 @@
 			<groupId>co.elastic.clients</groupId>
 			<artifactId>elasticsearch-java</artifactId>
 		</dependency>
+		<dependency>
+			<groupId>com.fasterxml.jackson.core</groupId>
+			<artifactId>jackson-databind</artifactId>
+		</dependency>
 		<dependency>
 			<groupId>org.slf4j</groupId>
 			<artifactId>jcl-over-slf4j</artifactId>

core/sail/elasticsearch/pom.xml

@@ -19,5 +19,9 @@
 			<groupId>co.elastic.clients</groupId>
 			<artifactId>elasticsearch-java</artifactId>
 		</dependency>
+		<dependency>
+			<groupId>com.fasterxml.jackson.core</groupId>
+			<artifactId>jackson-databind</artifactId>
+		</dependency>
 	</dependencies>
 </project>