feat(deps): add gapic-generator-java to bom (#1645)

Author: emmileaf

gapic-generator-java-bom/pom.xml

@@ -69,6 +69,11 @@
         <type>pom</type>
         <scope>import</scope>
       </dependency>
+      <dependency>
+        <groupId>com.google.api</groupId>
+        <artifactId>gapic-generator-java</artifactId>
+        <version>2.17.1-SNAPSHOT</version><!-- {x-version-update:gapic-generator-java:current} -->
+      </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-common-protos</artifactId>