[gtk] (20 commits) ...Merge branch 'ci-jobs' into 'master'

[Emmanuele Bassi <ebassi src gnome org>]

Summary of changes:

  153e8a0... ci: Use release builds for Flatpak bundles (*)
  56f9cdd... ci: Refactor the CI pipeline (*)
  9e38a70... ci: Replicate the CI image scripts from GLib (*)
  c06a08d... ci: Split the static and shared builds (again) (*)
  02ac7ff... Initialise out variable (*)
  74b5bb1... ci: Disable ccache (*)
  62352dd... Fix compiler warnings in the release build (*)
  a7d2952... ci: Add static packages for GLib and PCRE (*)
  5ace9ef... ci: Use the new Fedora image (*)
  c00896a... ci: Remove static build job (*)
  c4dfacc... ci: Add missing newline escape (*)
  1806af1... Declare global counter only in debug builds (*)
  47c4464... Silence compiler warnings in non-debug builds (*)
  0df542e... Declare global counters only in debug builds (*)
  59028d7... ci: Generate the report for the release builds (*)
  76aba1f... ci: Add a style check pass (*)
  c69595a... vulkan: Handle VK_ERROR_UNKNOWN (*)
  b99a4da... testsuite/gtk: Add xfail tests (*)
  2b425fa... ci: Allow release job to fail (*)
  bb71cdd... Merge branch 'ci-jobs' into 'master'

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