[Register Service] GCP service dependencies in register-core/pom.xml

GCP service dependencies exist in the register-core/pom.xml

 <dependency>
            <groupId>com.google.cloud</groupId>
            <artifactId>google-cloud-pubsub</artifactId>
            <version>1.82.0</version>
        </dependency>
        <dependency>
            <groupId>com.google.cloud</groupId>
            <artifactId>google-cloud-datastore</artifactId>
            <version>1.82.0</version>
            <exclusions>
                <exclusion>
                    <groupId>com.google.guava</groupId>
                    <artifactId>guava</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>com.google.apis</groupId>
            <artifactId>google-api-services-cloudkms</artifactId>
            <version>v1-rev86-1.24.1</version>
        </dependency>