drm/amdgpu: use drm_exec for GEM and CSA handling v2

Start using the new component here as well.

v2: ignore duplicates to allow per VM BO mappings

Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230711133122.3710-5-christian.koenig@amd.com