rust: drm: add device abstraction

Implement the abstraction for a `struct drm_device`.

A `drm::Device` creates a static const `struct drm_driver` filled with
the data from the `drm::Driver` trait implementation of the actual
driver creating the `drm::Device`.

Reviewed-by: Maxime Ripard <mripard@kernel.org>
Signed-off-by: Asahi Lina <lina@asahilina.net>
Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Link: https://lore.kernel.org/r/20250410235546.43736-5-dakr@kernel.org
[ Rewrite of drm::Device
    * full rewrite of the drm::Device abstraction using the subclassing
      pattern
    * original source archive: http://archive.today/5NxBo



  - Danilo ]
Signed-off-by: Danilo Krummrich <dakr@kernel.org>