migrate to autogenerated google/cloud/bigquery_storage/__init__.py with post processing

Author: parthea

scripts/client-post-processing/bigquery-storage-integration.yaml

@@ -127,5 +127,59 @@ replacements:
           "pyarrow": ["pyarrow>=0.15.0"],
       }
     count: 1
-
-
+  - paths: [
+      packages/google-cloud-bigquery-storage/google/cloud/bigquery_storage/__init__.py,
+    ]
+    before: |
+      from google.cloud.bigquery_storage_v1.services.big_query_read.async_client import \(
+          BigQueryReadAsyncClient,
+      \)
+      from google.cloud.bigquery_storage_v1.services.big_query_read.client import \(
+          BigQueryReadClient,
+      \)
+    after: |
+      from google.cloud.bigquery_storage_v1 import BigQueryReadClient
+      from google.cloud.bigquery_storage_v1 import gapic_types as types
+      from google.cloud.bigquery_storage_v1.reader import ReadRowsStream
+    count: 1
+  - paths: [
+      packages/google-cloud-bigquery-storage/google/cloud/bigquery_storage/__init__.py,
+    ]
+    before: |
+      from google.cloud.bigquery_storage_v1.types.table import TableFieldSchema, TableSchema\n
+      __all__ = \(
+    after: |
+      from google.cloud.bigquery_storage_v1.types.table import TableFieldSchema, TableSchema
+      from google.cloud.bigquery_storage_v1.writer import AppendRowsStream\n
+      __all__ = (
+    count: 1
+  - paths: [
+      packages/google-cloud-bigquery-storage/google/cloud/bigquery_storage/__init__.py,
+    ]
+    before: |
+      "BigQueryReadClient",
+          "BigQueryReadAsyncClient",
+          "BigQueryWriteClient",
+          "BigQueryWriteAsyncClient",
+          "ArrowRecordBatch",
+    after: |
+      "BigQueryReadClient",
+          "BigQueryWriteClient",
+          "BigQueryWriteAsyncClient",
+          "__version__",
+          "types",
+          "ArrowRecordBatch",
+    count: 1
+    count: 1
+  - paths: [
+      packages/google-cloud-bigquery-storage/google/cloud/bigquery_storage/__init__.py,
+    ]
+    before: |
+      "ThrottleState",
+          "ReadSession",
+    after: |
+      "ThrottleState",
+          "AppendRowsStream",
+          "ReadRowsStream",
+          "ReadSession",
+    count: 1