dotnet returning variable object removed and replace by float value.

### Description of the current limitations

The last PR is removing the returned variable object for instance
self.edbapp["via_y"].value == 1e-3
and instead
self.edbapp["via_y"] == 1e-3
to bring compatibility with grpc.
This might be discussed with the team.

### Code sample expected

_No response_

### Useful links and references

_No response_