fix: migrate gaming/v1beta to grpc_service_config

PiperOrigin-RevId: 319050646

google/cloud/gaming/v1beta/BUILD.bazel

@@ -69,6 +69,7 @@ java_gapic_library(
     name = "gaming_java_gapic",
     src = ":gaming_proto_with_info",
     gapic_yaml = "gaming_gapic.yaml",
+    grpc_service_config = "gaming_grpc_service_config.json",
     package = "google.cloud.gaming.v1beta",
     service_yaml = "gameservices_v1beta.yaml",
     test_deps = [
@@ -198,6 +199,7 @@ py_gapic_library(
     name = "gaming_py_gapic",
     src = ":gaming_proto_with_info",
     gapic_yaml = "gaming_gapic.yaml",
+    grpc_service_config = "gaming_grpc_service_config.json",
     package = "google.cloud.gaming.v1beta",
     service_yaml = "gameservices_v1beta.yaml",
     deps = [
@@ -242,6 +244,7 @@ php_gapic_library(
     name = "gaming_php_gapic",
     src = ":gaming_proto_with_info",
     gapic_yaml = "gaming_gapic.yaml",
+    grpc_service_config = "gaming_grpc_service_config.json",
     package = "google.cloud.gaming.v1beta",
     service_yaml = "gameservices_v1beta.yaml",
     deps = [