Data Labeling: Add nox session docs, reorder methods (via synth).

[yoshi-automation]

This PR was generated using Autosynth. 🌈

Here's the log from Synthtool:

synthtool > Executing /tmpfs/src/git/autosynth/working_repo/datalabeling/synth.py. synthtool > Ensuring dependencies. synthtool > Pulling artman image. latest: Pulling from googleapis/artman Digest: sha256:c58f4ec3838eb4e0718eb1bccc6512bd6850feaa85a360a9e38f6f848ec73bc2 Status: Image is up to date for googleapis/artman:latest synthtool > Cloning googleapis. synthtool > Running generator for google/cloud/datalabeling/artman_datalabeling_v1beta1.yaml. synthtool > Generated code into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/datalabeling-v1beta1. synthtool > Copy: /home/kbuilder/.cache/synthtool/googleapis/google/cloud/datalabeling/v1beta1/operations.proto to /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/datalabeling-v1beta1/google/cloud/datalabeling_v1beta1/proto/operations.proto synthtool > Copy: /home/kbuilder/.cache/synthtool/googleapis/google/cloud/datalabeling/v1beta1/data_labeling_service.proto to /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/datalabeling-v1beta1/google/cloud/datalabeling_v1beta1/proto/data_labeling_service.proto synthtool > Copy: /home/kbuilder/.cache/synthtool/googleapis/google/cloud/datalabeling/v1beta1/dataset.proto to /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/datalabeling-v1beta1/google/cloud/datalabeling_v1beta1/proto/dataset.proto synthtool > Copy: /home/kbuilder/.cache/synthtool/googleapis/google/cloud/datalabeling/v1beta1/annotation.proto to /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/datalabeling-v1beta1/google/cloud/datalabeling_v1beta1/proto/annotation.proto synthtool > Copy: /home/kbuilder/.cache/synthtool/googleapis/google/cloud/datalabeling/v1beta1/human_annotation_config.proto to /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/datalabeling-v1beta1/google/cloud/datalabeling_v1beta1/proto/human_annotation_config.proto synthtool > Copy: /home/kbuilder/.cache/synthtool/googleapis/google/cloud/datalabeling/v1beta1/instruction.proto to /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/datalabeling-v1beta1/google/cloud/datalabeling_v1beta1/proto/instruction.proto synthtool > Copy: /home/kbuilder/.cache/synthtool/googleapis/google/cloud/datalabeling/v1beta1/annotation_spec_set.proto to /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/datalabeling-v1beta1/google/cloud/datalabeling_v1beta1/proto/annotation_spec_set.proto synthtool > Placed proto files into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/datalabeling-v1beta1/google/cloud/datalabeling_v1beta1/proto. synthtool > Replaced 'operations_pb2.ImportDataOperationResponse' in google/cloud/datalabeling_v1beta1/gapic/data_labeling_service_client.py. synthtool > Replaced 'operations_pb2.ImportDataOperationMetadata' in google/cloud/datalabeling_v1beta1/gapic/data_labeling_service_client.py. synthtool > Replaced 'operations_pb2.Operation\\(' in tests/unit/gapic/v1beta1/test_data_labeling_service_client_v1beta1.py. .coveragerc .flake8 MANIFEST.in noxfile.py.j2 setup.cfg Running session blacken Creating virtualenv using python3.6 in /tmpfs/src/git/autosynth/working_repo/datalabeling/.nox/blacken pip install black black google tests docs reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/__init__.py reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/__init__.py reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/datalabeling.py reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/datalabeling_v1beta1/gapic/enums.py reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/datalabeling_v1beta1/gapic/data_labeling_service_client_config.py reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/datalabeling_v1beta1/proto/annotation_pb2_grpc.py reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/datalabeling_v1beta1/gapic/transports/data_labeling_service_grpc_transport.py reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/datalabeling_v1beta1/proto/annotation_spec_set_pb2_grpc.py reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/datalabeling_v1beta1/proto/annotation_spec_set_pb2.py reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/datalabeling_v1beta1/proto/data_labeling_service_pb2_grpc.py reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/datalabeling_v1beta1/gapic/data_labeling_service_client.py reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/datalabeling_v1beta1/proto/dataset_pb2_grpc.py reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/datalabeling_v1beta1/proto/annotation_pb2.py reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/datalabeling_v1beta1/proto/human_annotation_config_pb2_grpc.py reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/datalabeling_v1beta1/proto/human_annotation_config_pb2.py reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/datalabeling_v1beta1/proto/instruction_pb2_grpc.py reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/datalabeling_v1beta1/proto/instruction_pb2.py reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/datalabeling_v1beta1/proto/operations_pb2_grpc.py reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/datalabeling_v1beta1/types.py reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/datalabeling_v1beta1/proto/dataset_pb2.py reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/datalabeling_v1beta1/proto/data_labeling_service_pb2.py reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/tests/unit/gapic/v1beta1/test_data_labeling_service_client_v1beta1.py reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/datalabeling_v1beta1/proto/operations_pb2.py All done! ✨ 🍰 ✨ 23 files reformatted, 5 files left unchanged. Session blacken was successful. synthtool > Cleaned up 2 temporary directories. synthtool > Wrote metadata to synth.metadata. 

[busunkim96]

Ignoring failing tests in unrelated APIs: Bigtable, Datastore

reCAPTCHA Enterprise has not been merged.