[gtk+] (10 commits) Non-fast-forward update to branch wip/matthiasc/renderpasses

[Matthias Clasen <matthiasc src gnome org>]

The branch 'wip/matthiasc/renderpasses' 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:

  0b2541d... vulkan: shift data to the render pass
  0ef4f5f... first pass at multiple render passes

Commits added to the branch:

  08e3753... gdk-wayland: Do not leak dummy 1x1 surface on every draw (*)
  d812fc8... gdk: Tone down Vulkan validation (*)
  145e4fd... gsk: Fix Vulkan validation errors for image upload (*)
  4854705... vulkan: Update the outset-shadow fragment shaders (*)
  85b37c4... vulkan: shift data to the render pass
  b9bb357... first pass at multiple render passes
  d297201... Add an api to create intermediate textures
  53f7ef5... Use the new api
  28f5043... Small fix for render pass setup
  156ecb9... add semaphores

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