vello_hybrid: Always inline `draw_mut` (#1404)

Before:
<img width="1492" height="735" alt="image"
src="https://github.com/user-attachments/assets/cadd91f2-b2e2-4f36-9ff7-287a1ac4055f"
/>

After:
<img width="1482" height="733" alt="image"
src="https://github.com/user-attachments/assets/c561b49f-8cf1-47a7-b663-527512983000"
/>

sparse_strips/vello_hybrid/src/schedule.rs

diff --git a/sparse_strips/vello_hybrid/src/schedule.rs b/sparse_strips/vello_hybrid/src/schedule.rs
index cedd44c..df9ef49 100644
--- a/sparse_strips/vello_hybrid/src/schedule.rs
+++ b/sparse_strips/vello_hybrid/src/schedule.rs
@@ -540,6 +540,7 @@
     }
 
     // Find the appropriate draw call for rendering.
+    #[inline(always)]
     fn draw_mut(&mut self, el_round: usize, texture_idx: usize) -> &mut Draw {
         &mut self.get_round(el_round).draws[texture_idx]
     }