Add insights_config for mssql sub-module

[koushikgongireddy]

TL;DR

I would like to enable insights_config for mssql instance on Sql Database, so that we can get the query details and what's causing the Database problems

Terraform Resources

* Module repo: `terraform-google-modules/terraform-google-sql-db`

Detailed design

Here is the code expected

  settings = {
    tier = "db-custom-2-7680"
    # ... other settings ...
    insights_config = {
      query_insights_enabled   = true
      query_string_length      = 2048      # Optional
      record_client_address    = true      # Optional
      query_plans_per_minute   = 10        # Optional
    }
  }

Additional information

No response

[imrannayer]

@koushikgongireddy use parameter to enable it on mysql cluster.

[koushikgongireddy]

@imrannayer We are using Sql Server and not mqsql