NIFI-13268 Fixed missing grpc dependencies in GCP module

This closes apache#8863

Signed-off-by: Joseph Witt <[email protected]>

nifi-extension-bundles/nifi-gcp-bundle/nifi-gcp-services-api/pom.xml

@@ -31,5 +31,23 @@
             <groupId>com.google.auth</groupId>
             <artifactId>google-auth-library-oauth2-http</artifactId>
         </dependency>
+        <!-- please do not remove grpc-* dependencies because they are used by GCP processors at runtime,
+             see also https://github.com/apache/nifi/pull/8491#issuecomment-1992542785 -->
+        <dependency>
+            <groupId>io.grpc</groupId>
+            <artifactId>grpc-api</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>io.grpc</groupId>
+            <artifactId>grpc-context</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>io.grpc</groupId>
+            <artifactId>grpc-core</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>io.grpc</groupId>
+            <artifactId>grpc-util</artifactId>
+        </dependency>
     </dependencies>
 </project>