Merge changes I03536e9c,I39c35c06,Id2cd7d83,I0748434e,If5776b43, ... into main

* changes:
  Add Priority to the ThreadPool
  init: Introduce thread pool to Coldboot
  init: Move Coldboot to new files
  libmodprobe: Implement ModuleDependencyGraph
  libmodprobe: Define InitModule helper
  libmodprobe: Rename MakeCanonical to CanonicalizeModulePath
  libmodprobe: Define ModuleConfig
  init: Introduce thread pool