[BUG] Correct datatype for timestamp columns in all tables

[Sachinbisht27]

Describe the bug While migrating the data from the application database to BigQuery, we faced an issue: The Datetime column's data was not getting migrated because it supports the timestamp with timezone only. We wanted to correct all the timestamp columns in the application to the timestamptz.

To Reproduce Run Migrations on AirByte.

Expected behavior

• [x] All the timestamp columns in the application models should be updated to timestamptz.
  • [x] Update the logic to pick a time in IST only.
  • [x] Correct all models to enable the timezone.
  • [x] Create migrations for all the changes in the model schema.
  • [x] Test and deploy.

Additional context NA

Acceptance Criteria

• [x] The migrations in the AirByte should run properly without any issues.

Documentation Add whatever documentation will be required here.

[Sachinbisht27]

Closing the issue as completed and released on production.