[fix] rikctl: match new workload definition

[alexandrebrg]

Partially complete #54 (it does not use common crate for types)

📑 Description

• Add workload kind in get workloads
• Bump prettytable version to fix segfault
• Make get workload match new workload definition

✅ Checks

• [x] My pull request adheres to the code style of this project
• [x] My code is documented
• [x] I provided unitary tests or procedure to test my code
• [x] My PR have a clear description of what my code is supposed to do

ℹ Additional Information

[JeremyLARDENOIS]

@AlexandreBrg Please, can you resolve your file conflicts?