🐛 octavia-cli: do not use deepcopy in _get_comparable_configuration

[alafanechere]

Running deep copy on SourceRead / DestinationRead object does not work leading to errors such as:

TypeError: _from_openapi_data() missing 6 required positional arguments: 'source_definition_id', 'source_id', 'workspace_id', 'connection_configuration', 'name', and 'source_name'

deepcopy does not call the constructor as expected. Rather than defining a custom deepcopy hook, I prefer to discard its usage and prefer to create a new dict rather than mutating it.