CreateProductVariantInput is missing `enabled` field

[oliverstreissi]

Describe the bug
The enabled field can't set when creating a productVariant with the createProductVariant mutation from the admin api
https://docs.vendure.io/reference/graphql-api/admin/input-types#createproductvariantinput

[hooooooouzx]

Hey bro, I met the same issue before, for now we can't set enabled field while creating a new variant, we can update the value using updateProductVariants