…rame object (#833)

* feat: `to_gbq` fails with `TypeError` if passing in a bigframes DataFrame object

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

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Source-Link: googleapis/synthtool@e808c98
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…t field types (#838)

* fix: `to_gbq` uses `default_type` for ambiguous array types and struct field types

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

* fix arrow list(null) case too

* 🦉 Updates from OwlBot post-processor

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* lint

* Update pandas_gbq/schema/pandas_to_bigquery.py

Co-authored-by: Chalmer Lowe <chalmerlowe@google.com>

* Update pandas_gbq/schema/pandas_to_bigquery.py

Co-authored-by: Chalmer Lowe <chalmerlowe@google.com>

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

* remove redundant string check

* Apply suggestions from code review

Co-authored-by: Chalmer Lowe <chalmerlowe@google.com>

* add docstrings and a few more test cases

* use python 3.10 for docs github action

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Co-authored-by: Chalmer Lowe <chalmerlowe@google.com>

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