Suppliers: Bad categories in backend

[amotenko]

In database, supplier category enum supports types that are not supported by Spark, such as food and water. This is inconsistent with our data and probably bad.
For this year we only have Moving, and Other.

1. Create migration to remove unused types.
2. Make sure front doesn't use those types somewhere.

[yprez]

Prod db state doesn't match the model. Trying to add migration. Old categories aren't used anywhere.