Format CLI test list

[schoren]

the test list command still outputs json. We need to implement a simple table, and support the --json option (see #1179)

Example:

$ tracetest test list

| Name            | Last run            | Passed | Failed | Link                                                            |
| --------------- | ------------------- | ------ | ------ | --------------------------------------------------------------- |
| List Pokemons   | 2022-05-23 17:34:21 |    5   |    0   | http://localhost:8080/test/41985306-2fdc-4329-a668-08b1bddcfa42 |
| Delete Pokemons | 2022-05-23 14:00:00 |   11   |    1   | http://localhost:8080/test/41985306-2fdc-4329-a668-08b1bddcfa42 |
| Import Pokemons | 2022-05-23 11:10:54 |    0   |    1   | http://localhost:8080/test/41985306-2fdc-4329-a668-08b1bddcfa42 |

[schoren]

I'm not convinced that we should show the last run, passed, failed columns, specially because the link points to the test page and not the test run details. I also want to point to that page to keep the links as short as possible.

What do you think @mathnogueira?

[mathnogueira]

I dont have a strong opinion about it. Maybe just the last execution time would be nice to have. But the passed/failed could be removed