ci: migrate from minio to s3

Rename `MINIO_HOST` to `STORAGE_HOST`.

Reviewed-by: Guilherme Gallo <guilherme.gallo@collabora.com>
Signed-off-by: David Heidelberg <david.heidelberg@collabora.com>
Part-of: <https://gitlab.freedesktop.org/virgl/virglrenderer/-/merge_requests/977>
3 files changed