ci(integration): run on Github runners only for now

- garm runners often run into host system issues and render the test
  unreliable
  (Error response from daemon: symlink /proc/mounts/var/lib/docker/fuse-overlayfs/$hash-init/merged/etc/mtab: file exists)

Signed-off-by: Arthur Schiwon <blizzz@arthur-schiwon.de>

Author: blizzz

.github/workflows/integration.yml

@@ -21,7 +21,7 @@ env:
 
 jobs:
   integration:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
 
     strategy:
       fail-fast: false