EEVEE: Rename and move old gtao properties

- Move `gtao_distance` to view layer and rename to
  `ambient_occlusion_distance` (API change).
- Remove `gtao_quality` from the RNA (API change).
- Remove `use_gtao` (unused) from the RNA (API change).
- Rename `gtao_focus` to `fast_gi_bias` in the DNA (no API
  change).
- Rename `gtao_resolution` to `fast_gi_resolution` in the
  DNA (no API change).

Pull Request: https://projects.blender.org/blender/blender/pulls/140298

tests/python/eevee_render_tests.py

@@ -83,7 +83,8 @@ def setup():
         eevee.overscan_size = 50.0
 
         # Ambient Occlusion Pass
-        eevee.gtao_distance = 1
+        for view_layer in scene.view_layers:
+            view_layer.eevee.ambient_occlusion_distance = 1
 
         # Lights
         eevee.light_threshold = 0.001