chore: release 1.2.0

[release-please]

🤖 I have created a release *beep* *boop*

1.2.0 (2021-07-14)

Features

• Add additional_experiments field to AutoMlTablesInputs (#540) (96ee726)
• add always_use_jwt_access (#498) (6df4866)
• add explain get_metadata function for tf2. (#507) (f6f9a97)
• Add structure for XAI explain (from XAI SDK) (#502) (cb9ef11)
• Add two new ModelType constants for Video Action Recognition training jobs (96ee726)
• Adds AcceleratorType.NVIDIA_TESLA_A100 constant (f3a3d03)
• Adds additional_experiments field to AutoMlForecastingInputs (8077b3d)
• Adds additional_experiments field to AutoMlTablesInputs (#544) (8077b3d)
• Adds AutoscalingMetricSpec message (f3a3d03)
• Adds BigQuery output table field to batch prediction job output config (f3a3d03)
• Adds fields to Study message (f3a3d03)
• Adds JobState.JOB_STATE_EXPIRED constant (f3a3d03)
• Adds PipelineService methods for Create, Get, List, Delete, Cancel (f3a3d03)
• Adds two new ModelType constants for Video Action Recognition training jobs (8077b3d)
• Removes AcceleratorType.TPU_V2 and TPU_V3 constants (#543) (f3a3d03)

Bug Fixes

• Handle nested fields from BigQuery source when getting default column_names (#522) (3fc1d44)
• log pipeline completion and raise pipeline failures (#523) (2508fe9)
• making the uploader depend on tensorflow-proper (#499) (b95e040)
• Set prediction client when listing Endpoints (#512) (95639ee)

---

This PR was generated with Release Please. See documentation.

[yoshi-automation]

Release is at https://github.com/googleapis/python-aiplatform/releases/tag/v1.2.0

[release-tool-publish-reporter]

The release build has started, the log can be viewed here. 🌻

[release-tool-publish-reporter]

🥚 You hatched a release! The release build finished successfully! 💜