Include constraints config in model yml

[Victoriapm]

Describe the feature

Adds to the generate model yml macro an option to include constraints configurations by retrieving the column data.

This related to the feature in development in dbt-core issue #6079 and #6271

Describe alternatives you've considered

Additional context

It will be relevant for the supported data platforms: BigQuery, Snowflake and postgres initially

Who will this benefit?

Anyone using the dbt constraints feature

Are you interested in contributing this feature?

yes, I have already tested this in my project

[github-actions]

This issue has been marked as Stale because it has been open for 180 days with no activity. If you would like the issue to remain open, please comment on the issue or else it will be closed in 7 days.

[github-actions]

Although we are closing this issue as stale, it's not gone forever. Issues can be reopened if there is renewed community interest. Just add a comment to notify the maintainers.