Adding new AMD processor models for confidential computing attestation (bergamo, siena and turin) #4205
Description
With reference to uyuni-project/uyuni#10651:
- we are updating the number of AMD cpus that can undergo to confidential computing attestation, adding models bergamo, siena and turin (to existing milan and genoa)
- we are removing the "none" environment type: the confidential computing attestation has to specify the cpu model