[BEAM-10975] Remove capture_output argument in sdk_container_builder (#12942)

Author: y1chi

sdks/python/apache_beam/runners/dataflow/internal/apiclient_test.py

@@ -842,7 +842,7 @@ def test_experiment_use_multiple_sdk_containers(self):
 
   @mock.patch(
       'apache_beam.runners.dataflow.internal.apiclient.sys.version_info',
-      (3, 5))
+      (3, 8))
   def test_get_python_sdk_name(self):
     pipeline_options = PipelineOptions([
         '--project',
@@ -861,7 +861,7 @@ def test_get_python_sdk_name(self):
                                         1,
                                         FAKE_PIPELINE_URL)
     self.assertEqual(
-        'Apache Beam Python 3.5 SDK', environment._get_python_sdk_name())
+        'Apache Beam Python 3.8 SDK', environment._get_python_sdk_name())
 
   @mock.patch(
       'apache_beam.runners.dataflow.internal.apiclient.sys.version_info',

sdks/python/apache_beam/runners/portability/sdk_container_builder.py

@@ -149,7 +149,6 @@ def invoke_docker_build_and_push(self, container_image_name):
       _LOGGER.info("Building sdk container, this may take a few minutes...")
       now = time.time()
       subprocess.run(['docker', 'build', '.', '-t', container_image_name],
-                     capture_output=True,
                      check=True,
                      cwd=self._temp_src_dir)
     except subprocess.CalledProcessError as err:
@@ -164,9 +163,7 @@ def invoke_docker_build_and_push(self, container_image_name):
     if self._docker_registry_push_url:
       _LOGGER.info("Pushing prebuilt sdk container...")
       try:
-        subprocess.run(['docker', 'push', container_image_name],
-                       capture_output=True,
-                       check=True)
+        subprocess.run(['docker', 'push', container_image_name], check=True)
       except subprocess.CalledProcessError as err:
         raise RuntimeError(
             'Failed to push prebuilt sdk container %s, stderr: \n%s' %