[glib] (17 commits) Non-fast-forward update to branch freeze-shenanigans

[Matthias Clasen <matthiasc src gnome org>]

The branch 'freeze-shenanigans' 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:

  292bdc5... Add a testcase for notify-in-instance-init
  5cf611d... Unconditionally mark objects as in-construction
  daf29df... Handle a corner-case of notify avoidance
  b045986... Add another testcase
  b4e5515... Handle notify freezing with custom constructors

Commits added to the branch:

  afc8a8f... Remove tests/gobject/timeloop-closure.c performance test (*)
  fcbdfb5... Remove tests/gobject empty directory (*)
  714a0aa... gbinding: Remove some duplicated code for checking property (*)
  67a168c... tests: Test g_binding_get_source() and g_binding_get_target (*)
  edd497f... Merge branch 'binding-code-duplication' into 'main' (*)
  7a4560e... tests: Port GObject singleton test to GTest framework (*)
  9af0444... tests: Simplify singleton test code using G_DECLARE_FINAL_T (*)
  1215278... tests: Add a singleton construct-property test (*)
  98bd4ea... gobject: Don't thaw excessively (*)
  6e42e2e... Merge branch 'fix-freeze-count-underflow' into 'main' (*)
  6b65b72... Merge branch 'timeloop-closure_test' into 'main' (*)
  fb380b9... Add a testcase for notify-in-instance-init
  9444ace... Unconditionally mark objects as in-construction
  58ab960... Handle a corner-case of notify avoidance
  dccab10... Add another testcase
  b92f1fc... Handle notify freezing with custom constructors
  7e7ddfd... Avoid atomics during construction

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