Feature request: validate resource type in resourceId() call

I was pairing with @jorgecotillo on some ARM templates, and we were using this ARM output parameter:

"outputs": {
    "pcf-subnet-nsg-id": {
      "type": "string",
      "value": "[resourceId('Microsoft.Network/networkSecurityGrops', variables('pcf-nsg-name'))]"
    }
  }

There is a typo in the resource provider that was causing this error in ARM:

{
"code": "InvalidJsonReferenceFormat",
        "message": "Reference Id /subscriptions/cf0c53fb-06f5-4fe3-9c25-cabce6811cb1/resourceGroups/contoso-pcf-net-rg/providers/Microsoft.Network/networkSecurityGrops/pcf-nsg is not formatted correctly. The Id is expected to reference resources of type networkSecurityGroups. Path properties.subnets[0].properties.networkSecurityGroup."
}

It took us ~5-10 minutes to debug the issue because we missed the typo in the Resource Provider name. Once we fixed the typo, it resolved our issue.

By checking the validity of the Resource Provider that will help users be able to catch issues like ours much faster.

[StephenWeatherford]

Common scenarios could be handled in the extension.

[StephenWeatherford]

Depends on https://github.com/microsoft/vscode-azurearmtools/issues/718