Rename Deploy-ASCDF-Config to allow caf-enterprise-scale Terraform Module to remove breaking change

[jtracey93]

As detailed here Azure/terraform-azurerm-caf-enterprise-scale#264 (comment)

Due to policy parameters being removed from Deploy-ASCDF-Config as part of the recent MDFC plan changes as detailed here in the "What's New?" wiki page and PR #876, when trying to update this in the Terraform module the above error is seen.

To avoid a manual/breaking change for all caf-enterprise-scale Terraform module users, we should rename the Deploy-ASCDF-Config policy to Deploy-MDFC-Config to enable a clean removal and creation of a new policy by the Terraform module.

Other implementations like Bicep & ARM do not currently have an option for lifecycle management (aka "evergreen") so the changes will need to be handled by users of these separately by removing the old assignment of Deploy-ASCDF-Config and then creating a new initiative definition for Deploy-MDFC-Config (when published) and then re-assigning to the correct scope (contoso by default).