Ensure default connection policy is not in use for Azure SQL Server

Azure SQL Server instances use default connection policy, this goes against standard security compliance requirements.

In Azure Console -

1. Open the Azure Portal and go to SQL servers.
2. Choose the SQL server you wish to edit.
3. Under Networking, Under Connectivity, set Connection policy as Redirect.
4. Select Save

In Terraform -

1. In the azurerm_sql_server resource, set connection_policy to Redirect.

References:
https://learn.microsoft.com/en-us/azure/azure-sql/database/connectivity-settings?view=azuresql&tabs=azure-portal
https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/sql_server