drm/tests: Add tests for drm_connector_dynamic_init()/register()

drm/tests: Add tests for drm_connector_dynamic_init()/register()

Add kunit tests for
drm_connector_dynamic_init()/drm_connector_dynamic_register() added in
an earlier commit.

v2: Replace the reference to the patchset with "earlier commit". (Jani)

Suggested-by: Maxime Ripard <mripard@kernel.org>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Maxime Ripard <mripard@kernel.org>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241211230328.4012496-10-imre.deak@intel.com