[PATCH v4 0/5] MR2958: mf: Various refcount leak fixes for session.

[Bernhard Kölbl (＠besentv)]

--
  v4: mf: Don't shutdown sink activation objects in the media session.
      mf: Don't make stream sink shutdown dependent on IMFActivate presence in node.
      mf: Don't leak sink in session_get_renderer_node_service().
      mf: Clear queued topologies on session shutdown.
      mf/tests: Add tests for samplegrabber shutdown state.

https://gitlab.winehq.org/wine/wine/-/merge_requests/2958