chore: adding provider file

Author: florianow

modules/sapbtp/subaccounts/buildingblock/provider.tf

@@ -1,17 +1,3 @@
-terraform {
-  backend "azurerm" {
-    resource_group_name  = "buildingblocks-tfstates"
-    storage_account_name = "tfstatesw4l8d"
-    container_name       = "tfstates"
-    key                  = "sapbtp/subaccounts/terraform.tfstate"
-    subscription_id      = "ffb344c9-26d7-45f5-9ba0-806a024ae697"
-    client_id            = var.client_id
-    client_secret        = var.client_secret
-    tenant_id            = "5f0e994b-6436-4f58-be96-4dc7bebff827"
-    use_azuread_auth     = true
-  }
-}
-
 provider "btp" {
   globalaccount = var.globalaccount
   # using ENV vars in meshStack for username and password