Only assisted-service uses Hive directly

The remainder of the services within assisted installer do not touch any Hive APIs:

• assisted-image-service
• assisted-installer / assisted-installer-controller
• assisted-installer-agent 

go get github.com/openshift/hive/apis@e33d70397d57878e44d511ddc9ecee5521267d8a
go mod tidy
go mod vendor