feat: BigQuery nested fields (#47106)

* feat: BigQuery nested fields

Updates dataset definitions to allow `nested-fields`

Adds the `::sql.qp/nfc-path` to include nfc-path in the field
identifier.

* Add bigquery to nested-fields feature. Rework geographical-tips to allow adding to bigquery

* Parse RECORD type into maps

* Fix tests

* Fix tests

* Fix formatting

* Handle arrays of records

* Fix formatting

* Conditionally add nested-fields

* Fix test

* Update docs/developers-guide/driver-changelog.md

Co-authored-by: metamben <103100869+metamben@users.noreply.github.com>

* Update docs/developers-guide/driver-changelog.md

Co-authored-by: metamben <103100869+metamben@users.noreply.github.com>

* Update modules/drivers/bigquery-cloud-sdk/src/metabase/driver/bigquery_cloud_sdk.clj

Co-authored-by: metamben <103100869+metamben@users.noreply.github.com>

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Co-authored-by: metamben <103100869+metamben@users.noreply.github.com>