(`nullplatform_scope`) some deprecated values are marked as required

[marrws]

When creating a scope, required and deprecated field show a warning when applying my changes:

│ Warning: Argument is deprecated
│ 
│   with nullplatform_scope.static_files_scope,
│   on custom_scope.tf line 83, in resource "nullplatform_scope" "my_test_scope":
│   83:   log_group_name                  = "dummy_log_group_name"
│ 
│ Configure NRN using the 'nullplatform_provider_config' resource instead.
│ 
│ (and 6 more similar warnings elsewhere)

Expected behavior

• Deprecated values should be optional
• No warnings show in the console

The deprectation notice for scopes was added in 70f66c0 but other resources could be affected too.