Storage Account Permissions for Event Hub

[blgorman]

The build is failing because the storage account does not let the deployment ID have access to complete the operation.

The fix:

• Get the deployment Managed Identity in the IAC
• Use the managed identity ID to grant Storage Blob Data Contributor role to the hub identity on the capture storage account

Note: This is not related to the EVENT HUB ID. It is the deployment ID that needs to specfically get Blob Storage Contributor role assigned to it on the specific storage account.

What's interesting if you run this as an owner on the subscription under your own ID, this doesn't happen. However, using the build causes this problem

[blgorman]

For current talk, I'm just going to do this manually and then re-run the build to "prove" it will work