Enable Azure ARM template spec as Machine Profile input

Support for using ARM template specs as machine profiles. Previously, you could use only VMs as machine profiles. You can now use ARM template specs as machine profiles as well when creating Azure machine catalogs. This feature lets you take advantage of Azure ARM template features such as versioning. To ensure that the selected spec is configured correctly and contains required configurations, we perform validation on it. If the validation fails, you are prompted to select a different machine profile.