Sensitive Data in $additional_attributes

## Use Case
The Parameter `$additional_attributes`  may contain sensitive Data like Passwords, which should not be revealed by Puppet, f.e. in File-Diffs.

## Describe the Solution You Would Like
The Parameter `$additional_attributes`  should accept Datatype `Sensitive[Hash]`:
```puppet
  Variant[Hash, Sensitive[Hash]] $additional_attributes
```

