password_policy support in google_sql_user

[mnacharov]

TL;DR

Set a user password policy option isn't currently supported.

Terraform Resources

[google_sql_user](https://registry.terraform.io/providers/hashicorp/google/latest/docs/resources/sql_user)

Detailed design

Module should provide at least two options from the `password_policy` structure: `allowed_failed_attempts` and `enable_failed_attempts_check`. It will enhance the security of SQL instances.

Additional information

Google shows a warning about it in the Cloud Console:

Adding a policy via gcloud does not help since the next terraform apply will remove it.