Support Azure Stack Metrics

[zhicaigian]

@thetonymaster @katbyte
Sorry for the ping, but is the Terraform Azurestack Provider at its final release?

There have been features such as Key Vault & Azure Monitor in Azure stack Hub, albeit only accessible from the Azure Stack Hub Portal which isn't ideal :

1. https://docs.microsoft.com/en-us/azure-stack/user/azure-stack-key-vault-intro?view=azs-2008
2. https://docs.microsoft.com/en-us/azure-stack/user/azure-stack-metrics-azure-data?view=azs-2008

However, the Terraform Azurestack Provider at the moment provided no way to access the key vault & azure monitor which is important, especially from a security point of view.

Another feature that I would like to request:
The ability to define source/destination port rangeS, as well as source/destination _address_prefixES
those are very important, otherwise we would have a lot of rules. Thank you.

Thank you.

[kcighon]

Second this feature request please - for both resource and data sources:

https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/key_vault
https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/key_vault_secret

https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/data-sources/key_vault
https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/data-sources/key_vault_secret

Thankyou

[jbpaux]

It's #124 duplicate, can be closed

[katbyte]

#124 is key vault only so going to amend this to me for azure stack metrics, hope you don't mind @zhicaigian