PostgresToGoogleCloudStorageOperator - BigQuery schema type for time zone naive fields

[pierrejeambrun]

Fixes #11547

The idea here is to use DATETIME, DATE. and TIME fields in bigquery when the postgres columns is defined timezone naive.(timestamp, date, time <=> to timestamp without timezone, date without timezone and time without timezone)

I had to modify the convert_type function as BigQuery cannot import data for DATETIME, DATE. and TIME fields from a timestamp.

I also added some tests for that function. (Similar to what we have in airflow/providers/google/cloud/transfers/mysql_to_gcs.py)

[pierrejeambrun]

Hello @eladkal,

Here is the first draft for the PR.

Best,

[github-actions]

The PR is likely OK to be merged with just subset of tests for default Python and Database versions without running the full matrix of tests, because it does not modify the core of Airflow. If the committers decide that the full tests matrix is needed, they will add the label 'full tests needed'. Then you should rebase to the latest main or amend the last commit of the PR, and push it with --force-with-lease.