Support missing configuration for databricks workspace module

[jdocampo]

Improvements:

• Refactor module into folder to accommodate for future databricks modules (e.g. access connector)
• Added missing configurations
  • General
    • DBFS account name & tier
    • Machine Learning Workspace Id
  • Encryption
    • Customer managed encryption properties (managed resources and disk)
    • Customer managed key encryption (dbfs)
    • Infrastructure encryption
  • No Public IP / NPIP
    • Resource ID of the Outbound Load balancer Backend Address Pool
    • NAT Gateway name
• Added output values to match azurerm module
• Add encryption to module test
• Add missing private endpoint for DBFS storage account
• Add support for webauth mode in private link deployment type