Add protobuf-kotlin into protobuf-bom (#12936)

Close: #12810

Closes #12936

COPYBARA_INTEGRATE_REVIEW=#12936 from be-hase:issue-12810 f4df5b5
PiperOrigin-RevId: 541917182

Author: be-hase

java/bom/pom.xml

@@ -66,6 +66,11 @@
         <artifactId>protobuf-java-util</artifactId>
         <version>${project.version}</version>
       </dependency>
+      <dependency>
+        <groupId>com.google.protobuf</groupId>
+        <artifactId>protobuf-kotlin</artifactId>
+        <version>${project.version}</version>
+      </dependency>
     </dependencies>
   </dependencyManagement>