GH-3029: Remove HanaDB vector store autoconfiguration

Fixes: #3029

- Remove HanaDB vector store autoconfiguration
- Remove the corresponding starter
- Update docs
- Update maven configuration
- Remove autoconfiguration and starter entries from Spring AI BOM

Signed-off-by: Soby Chacko <soby.chacko@broadcom.com>

spring-ai-docs/src/main/antora/modules/ROOT/pages/api/vectordbs/hana.adoc

@@ -5,34 +5,10 @@
 * You need a SAP HANA Cloud vector engine account - Refer xref:api/vectordbs/hanadb-provision-a-trial-account.adoc[SAP HANA Cloud vector engine - provision a trial account] guide to create a trial account.
 * If required, an API key for the xref:api/embeddings.adoc#available-implementations[EmbeddingModel] to generate the embeddings stored by the vector store.
 
-
 == Auto-configuration
 
-[NOTE]
-====
-There has been a significant change in the Spring AI auto-configuration, starter modules' artifact names.
-Please refer to the https://docs.spring.io/spring-ai/reference/upgrade-notes.html[upgrade notes] for more information.
-====
-
-Spring AI provides Spring Boot auto-configuration for the SAP Hana Vector Store.
-To enable it, add the following dependency to your project's Maven `pom.xml` file:
-
-[source, xml]
-----
-<dependency>
-    <groupId>org.springframework.ai</groupId>
-    <artifactId>spring-ai-starter-vector-store-hana</artifactId>
-</dependency>
-----
-
-or to your Gradle `build.gradle` build file.
-
-[source,groovy]
-----
-dependencies {
-    implementation 'org.springframework.ai:spring-ai-starter-vector-store-hana'
-}
-----
+Spring AI does not provide a dedicated module for SAP Hana vector store.
+Users are expected to provide their own configuration in the applications using the standard vector store module for SAP Hana vector store in Spring AI - `spring-ai-hanadb-store`.
 
 TIP: Refer to the xref:getting-started.adoc#dependency-management[Dependency Management] section to add the Spring AI BOM to your build file.
 
@@ -317,6 +293,21 @@ public class CricketWorldCupHanaController {
 }
 ----
 
+Since HanaDB vector store support does not provide the autoconfiguration module, you also need to provide the vector store bean in your application, as shown below, as an example.
+
+[source,java]
+----
+@Bean
+public VectorStore hanaCloudVectorStore(CricketWorldCupRepository cricketWorldCupRepository,
+        EmbeddingModel embeddingModel) {
+
+    return HanaCloudVectorStore.builder(cricketWorldCupRepository, embeddingModel)
+        .tableName("CRICKET_WORLD_CUP")
+        .topK(1)
+        .build();
+}
+----
+
 
 * Use a `contextual` pdf file from wikipedia