feat(azure): add Azure SQL Server service and 3 checks

[edurra]

Context

This pull request adds a new Azure service (Azure SQL Server) and three associated checks.

Description

Checks:

• sqlserver_auditing_enabled: checks if there is any auditing configuration on the SQL server
• sqlserver_azuread_administrator_enabled: checks if at least one Azure Active Directory administrator is enabled in the server
• sqlserver_no_ingress_from_any: checks if there is any firewall rule that allows ingress traffic from any source (0.0.0.0-255.255.255.255)

Dependencies: azure-mgmt-sql = "^3.0.1"

License

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[sergargar]

Thank you @edurra , this is awesome!!
We will review it soon 🚀