Support endpoint to update experiments

Right now it's only possible to create an experiment, delete and list of an experiment. The TSP supports a PUT command to update the experiment (e.g. name or list of traces).

This tracker is to support the endpoint to update the experiment. Add also a command-line option to trigger the execution.
```
tsp_python-client --update-experiment --name --uuids
```
where at least of `--name`, `--uuids` is provided on the command-line or experiment is unchanged

see TSP: https://github.com/theia-ide/trace-server-protocol/blob/34d244cc35e652681b2f003d3bd69100da6541d6/API.yaml#L216

Note: https://github.com/theia-ide/trace-server-protocol/issues/69 is related and needs to be in take in consideration.