Move LoadHooks from Soong to Blueprint

Move LoadHooks from Blueprint and run them during ParseBlueprintsFiles.
This will allow them to add scoped module types that are visible to the
rest of the Blueprints file.  Requires passing the config object to
ParseBlueprintsFiles.

Test: all blueprint tests
Change-Id: Ia2a2c9a0223d5458bfd48bd22ebed0fdbd0156c6