fix: migrate bq/datatransfer/v1 to grpc_service_config

PiperOrigin-RevId: 320218003

google/cloud/bigquery/datatransfer/v1/BUILD.bazel

@@ -65,6 +65,7 @@ java_gapic_library(
     name = "datatransfer_java_gapic",
     src = ":datatransfer_proto_with_info",
     gapic_yaml = "bigquerydatatransfer_gapic.yaml",
+    grpc_service_config = "bigquerydatatransfer_grpc_service_config.json",
     package = "google.cloud.bigquery.datatransfer.v1",
     service_yaml = "bigquerydatatransfer_v1.yaml",
     test_deps = [
@@ -191,6 +192,7 @@ py_gapic_library(
     name = "datatransfer_py_gapic",
     src = ":datatransfer_proto_with_info",
     gapic_yaml = "bigquerydatatransfer_gapic.yaml",
+    grpc_service_config = "bigquerydatatransfer_grpc_service_config.json",
     package = "google.cloud.bigquery.datatransfer.v1",
     service_yaml = "bigquerydatatransfer_v1.yaml",
     deps = [
@@ -235,6 +237,7 @@ php_gapic_library(
     name = "datatransfer_php_gapic",
     src = ":datatransfer_proto_with_info",
     gapic_yaml = "bigquerydatatransfer_gapic.yaml",
+    grpc_service_config = "bigquerydatatransfer_grpc_service_config.json",
     package = "google.cloud.bigquery.datatransfer.v1",
     service_yaml = "bigquerydatatransfer_v1.yaml",
     deps = [

google/cloud/bigquery/datatransfer/v1/bigquerydatatransfer_gapic.yaml

@@ -55,10 +55,3 @@ interfaces:
     init_fields:
     - parent%project=$PROJECT_ID
     - parent%location="us-central1"
-  methods:
-  - name: DeleteTransferConfig
-    retry_codes_name: idempotent
-  - name: DeleteTransferRun
-    retry_codes_name: idempotent
-  - name: CheckValidCreds
-    retry_codes_name: idempotent