fix: Update IAM v3 groupId to the correct value (#3777)

GroupId value should be: `com.google.api.grpc`

Author: lqiu96

java-iam/pom.xml

@@ -143,12 +143,12 @@
         <version>1.56.1-SNAPSHOT</version><!-- {x-version-update:grpc-google-iam-v3:current} -->
       </dependency>
       <dependency>
-        <groupId>com.google.api.grpc.api.grpc</groupId>
+        <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-iam-v3</artifactId>
         <version>1.50.4-SNAPSHOT</version><!-- {x-version-update:proto-google-iam-v3:current} -->
       </dependency>
       <dependency>
-        <groupId>com.google.api.grpc.api.grpc</groupId>
+        <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-iam-v3</artifactId>
         <version>1.50.4-SNAPSHOT</version><!-- {x-version-update:grpc-google-iam-v3:current} -->
       </dependency>