[gimp/wip/schumaml/add-ci-prepare-stage] (11 commits) ...Merge branch 'wip/schumaml/add-ci-prepare-stage' of https://gitlab.gnome.org/GNOME/gimp into wip/sch

[Michael Schumacher <schumaml src gnome org>]

Summary of changes:

  63647ee... Update Romanian translation (*)
  30ad5ca... ci: Remove some unused deps (*)
  ae3d246... build: try to add a custom docker image prepare stage
  8a811fe... biuld: typo in prepare step
  b9a19ac... build: add apt-get update
  18b0ff2... build: no package install in debian CI builds
  9ff5825... build: create custom image for win64 builds
  78ec4a7... build: make sure CI clang build has an apt-cache directory
  2cefd8e... build: prepare custom CI image for win32 build
  c49e543... build: add CI needs: clauses to deps for image builds to sp
  f42662b... Merge branch 'wip/schumaml/add-ci-prepare-stage' of https:/

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