[mutter] (8 commits) Non-fast-forward update to branch wip/carlosg/fix-second-monitor-invalidations

[Carlos Garnacho <carlosg src gnome org>]

The branch 'wip/carlosg/fix-second-monitor-invalidations' 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:

  e0da39b... clutter/cogl: Fix invalidation on non-primary monitors with

Commits added to the branch:

  3f9c5d0... cogl: Remove old workaround for software Mesa (*)
  46aeb96... ci: Add gnome-control-center (*)
  17e39ad... cogl: Remove support for cogl.conf (*)
  6b8ee80... cogl: Remove unused deprecated material lighting API (*)
  468dc99... cogl: Remove unused pipeline lighting API (*)
  711023e... cogl: Remove unused COGL_PIPELINE_STATE_LIGHTING (*)
  e84dbd7... cogl: Remove unused CoglPipelineLightingState (*)
  ce68ece... clutter/cogl: Fix invalidation on non-primary monitors with

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