[gnome-runtime-images] (4 commits) Non-fast-forward update to branch alatiera/scheduled-stable-rebuilds

[Jordan Petridis <jpetridis src gnome org>]

The branch 'alatiera/scheduled-stable-rebuilds' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  88f1c88... Avoid rebuilding base images unless needed
  29f8e00... avoid rebuilding stable releases unless on scheduled pipeli

Commits added to the branch:

  6ec33b9... Allow rewriting manifests with multiple sources (*)
  eb1a62b... Avoid rebuilding base images unless needed
  c1ca964... avoid rebuilding stable releases unless on scheduled pipeli
  af669b2... ci: mark manual jobs as 'allow_failure' so the pipeline doe

(*) This commit already existed in another branch; no separate mail sent