Fix CassandraVectorStoreAutoConfiguration's @ConditionalOnClass to not include EmbeddingClient

Any autoconfigure on an embeddingClient was unnecessarily creating the CassandraVectorStore bean, and possible prematurely.

Author: michaelsembwever

spring-ai-spring-boot-autoconfigure/src/main/java/org/springframework/ai/autoconfigure/vectorstore/cassandra/CassandraVectorStoreAutoConfiguration.java

@@ -36,7 +36,7 @@
  * @since 1.0.0
  */
 @AutoConfiguration(after = CassandraAutoConfiguration.class)
-@ConditionalOnClass({ CassandraVectorStore.class, EmbeddingClient.class, CqlSession.class })
+@ConditionalOnClass({ CassandraVectorStore.class, CqlSession.class })
 @EnableConfigurationProperties(CassandraVectorStoreProperties.class)
 public class CassandraVectorStoreAutoConfiguration {