[vala] (7 commits) Non-fast-forward update to branch wip/singleton

[Rico Tzschichholz <ricotz src gnome org>]

The branch 'wip/singleton' 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:

  1c1c96e... Add support for singleton object classes

Commits added to the branch:

  70e09f7... codegen: Do not create a shadowing *_private_offset variabl (*)
  89e5bca... test: Add missing '\'s (*)
  717ea2f... gobject-2.0: Add missing symbols (*)
  b4cdfb7... gdk-3.0,gtk+-3.0: Update to 3.23.0+df045423 (*)
  3036291... gtk+-4.0: Update to 3.94.0+7030e08f (*)
  45fd1ef... girparser: Handle unsupported aliases which could not be fu (*)
  f2aead1... Add support for singleton object classes

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