feat: add grpc-gcp to dependencyManagement (#389)

Add gRPC-GCP extension library to shared dependencies. This will be used by the Spanner client first: googleapis/java-spanner#1227

Author: nimf

pom.xml

@@ -57,6 +57,7 @@
 
  <grpc.version>1.38.1</grpc.version>
  <gax.version>1.65.1</gax.version>
+ <grpc-gcp.version>1.0.0</grpc-gcp.version>
  <guava.version>30.1.1-android</guava.version>
  <protobuf.version>3.17.3</protobuf.version>
  <google.api-common.version>1.10.4</google.api-common.version>
@@ -93,6 +94,11 @@
  <type>pom</type>
  <scope>import</scope>
  </dependency>
+ <dependency>
+ <groupId>com.google.cloud</groupId>
+ <artifactId>grpc-gcp</artifactId>
+ <version>${grpc-gcp.version}</version>
+ </dependency>
  <dependency>
  <groupId>com.google.guava</groupId>
  <artifactId>guava-bom</artifactId>