feat: add gRPC RLS dependency (#1875)

Register gRPC RLS for DirectPath.

Author: mohanli-ml

google-cloud-spanner/pom.xml

@@ -139,7 +139,7 @@
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-dependency-plugin</artifactId>
           <configuration>
-            <ignoredDependencies>io.grpc:grpc-protobuf-lite,org.hamcrest:hamcrest,org.hamcrest:hamcrest-core,com.google.errorprone:error_prone_annotations,org.openjdk.jmh:jmh-generator-annprocess,com.google.api.grpc:grpc-google-cloud-spanner-v1,com.google.api.grpc:grpc-google-cloud-spanner-admin-instance-v1,com.google.api.grpc:grpc-google-cloud-spanner-admin-database-v1,javax.annotation:javax.annotation-api,io.opencensus:opencensus-impl,org.graalvm.sdk:graal-sdk</ignoredDependencies>
+            <ignoredDependencies>io.grpc:grpc-protobuf-lite,org.hamcrest:hamcrest,org.hamcrest:hamcrest-core,com.google.errorprone:error_prone_annotations,org.openjdk.jmh:jmh-generator-annprocess,com.google.api.grpc:grpc-google-cloud-spanner-v1,com.google.api.grpc:grpc-google-cloud-spanner-admin-instance-v1,com.google.api.grpc:grpc-google-cloud-spanner-admin-database-v1,javax.annotation:javax.annotation-api,io.opencensus:opencensus-impl,org.graalvm.sdk:graal-sdk,io.grpc:grpc-grpclb,io.grpc:grpc-googleapis,io.grpc:grpc-rls</ignoredDependencies>
           </configuration>
         </plugin>
       </plugins>
@@ -296,6 +296,21 @@
       <groupId>io.grpc</groupId>
       <artifactId>grpc-alts</artifactId>
     </dependency>
+    <dependency>
+      <groupId>io.grpc</groupId>
+      <artifactId>grpc-grpclb</artifactId>
+      <scope>runtime</scope>
+    </dependency>
+    <dependency>
+      <groupId>io.grpc</groupId>
+      <artifactId>grpc-googleapis</artifactId>
+      <scope>runtime</scope>
+    </dependency>
+    <dependency>
+      <groupId>io.grpc</groupId>
+      <artifactId>grpc-rls</artifactId>
+      <scope>runtime</scope>
+    </dependency>
 
     <dependency>
       <groupId>org.graalvm.sdk</groupId>