fix: Add skip_requesting_account_id and use endpoints.s3 for Backblaze B2

terraform/backend.tf

@@ -5,6 +5,7 @@ terraform {
     skip_credentials_validation = true
     skip_metadata_api_check     = true
     skip_region_validation      = true
+    skip_requesting_account_id  = true
     force_path_style            = true
   }
 }