Have CAS that supports bst master
Context
https://gitlab.com/freedesktop-sdk/freedesktop-sdk/-/jobs/220318732 currently bst master can be tested against freedesktop-sdk only with CAS disabled since our CAS doesn't support bst master.
[--:--:--] STATUS public-stacks/buildsystems.bst: Pulling artifact dff577b9 <- https://local-cas-server:1102
[00:00:00] FAILURE public-stacks/buildsystems.bst: Failed to pull artifact: Method not found!
Description
Deploy new CAS? Upgrade CAS?
Acceptance Criteria
We can run both regular bst releases and bst master against CAS.