Hashicorp injects their Azure Partner ID into your terraform deployments

Please remove the default partner_id from azurerm that was introduced in #4663 . If no provider_id is specified, then no provider_id should be sent to Azure.

Using the default "terraform" partner_id is absolutely unacceptable. The partner_id is used for a Microsoft program called Azure Template Tracking. Partners who provide their partner id will get credits or some kind of (possibly confidential) information about the deployments. So, maybe "terraform" gets detailed information about our deployment structure. For us, this is a very critical security and compliance issue.

From Microsoft documentation:

This program will allow ISVs who deploy their software on an Azure customer’s infrastructure an opportunity to get credit for the impact of their software.

The data generated by the Azure ISV Customer Usage Attribution program will be used for ISV partners to qualify for partner programs by providing a automated method of linking a customers usage to the ISVs software.

ISV partners will receive reporting for deployments from the Azure ISV Customer Usage Attribution program. Data may be anonymized for deployments from outside of Azure Marketplace. Reporting will be made available in the Cloud Publisher Portal, the same platform where GUIDs will be registered and partners can configure and manage listings for Azure Marketplace.