Tracking issue for More Sagas

[smklein]

Some operations in Nexus should become sagas. This issue tracks any and all operations that should become sagas:

• Instance Create
• Instance Delete: [nexus] Instance Deletion is now a saga #2060
• Disk Create
• Disk Delete
• Snapshot Create
• Snapshot Delete: [nexus] Make snapshot deletion a saga #2090
• Volume Delete
• Volume Remove ROP
• Project Create: [nexus] Project and VPC creation are now sagas #2081
• Project Delete
• VPC Create: [nexus] Project and VPC creation are now sagas #2081
• VPC Delete
• Org Create (Unless we remove orgs?)
• Org Delete (Unless we remove orgs?)
• Silo Create
• Silo Delete

See also: #2052, #2094