Fix wrong role(s) used on permissions/cleanup tasks

[WengerK]

💬 Describe the bug

Most of the task must run on the app permission. This is important to use the proper permission especially for people using a multiserver loadbalancing. Where some command should be run only on 1 server to avoid File Stale issues (cleanup drush cr on shared files for example on 2 servers at the same time).

To avoid many of those probleme, we should fix the permissions/cleanup tasks where we use app instead of web - especially on the release cleanup fodler. As those directories are created on all mirror-server and therefore should be fixed on all server - not only `app.

    desc 'Set cleanup permissions to allow deletion of releases'
    task :cleanup do
-      on roles(:app) do
+      on roles(:web) do
        releases = capture(:ls, '-x', releases_path).split
        valid, invalid = releases.partition { |e| /^\d{14}$/ =~ e }