[gnome-runtime-images/alatiera/foo] Drop privileged tag

[Jordan Petridis <jpetridis src gnome org>]

commit d0aed165af9b92158c18352826c40c0ded4b0ca2
Author: Bartłomiej Piotrowski <bpiotrowski gnome org>
Date:   Mon Jul 20 19:48:06 2020 +0200

    Drop privileged tag

 .gitlab-ci.yml | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index bbea534..f3467a1 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,9 +1,10 @@
-image: 'registry.fedoraproject.org/fedora:30'
+image: 'registry.freedesktop.org/freedesktop/ci-templates/buildah:2020-03-24'
 
 # Buildah can't use 'overlay' driver when running inside docker
 variables:
-    STORAGE_DRIVER: vfs
-    BUILDAH_FORMAT: docker
+    STORAGE_DRIVER: 'vfs'
+    BUILDAH_FORMAT: 'docker'
+    BUILDAH_ISOLATION: 'chroot'
 
 stages:
     - base
@@ -11,10 +12,7 @@ stages:
     - rust_bundle
 
 default:
-    tags:
-        - privileged
     before_script:
-        - dnf install -y buildah podman
         - buildah login -u gitlab-ci-token -p ${CI_JOB_TOKEN} ${CI_REGISTRY}
 
         # Newer versions of podman/buildah try to set overlayfs mount options when