fix(renderer): Update dead macro names (#12933) 09c54e8737

DISABLE_CLIP_RECT_FOR_VULKAN_MSAA was renamed to
DISABLE_CLIP_DISTANCE_FOR_UBERSHADERS in #11040 (generalized from
Vulkan-only to all MSAA ubershaders), which moved the #ifndef check
sites to the new name. However, three #define sites were still on the
old name.

  - draw_msaa_stencil.main
  - clear_clockwise_atomic_clip.main
  - init_clockwise_atomic_workaround.frag

The latter two were added in #12120, five months after the rename,
copy-pasting the already-dead define, so they had never once taken
effect.

Author: csmartdalton

.rive_head

@@ -1 +1 @@
-6c71d9da2120cadb9f78c6e72091e7898f075b4b
+09c54e8737317a5976777a4aea9afb65a44b4c60