Set up cava benchmark

• Set up cava benchmark w/ criterion.
• GPU schedule for cava.
• Convert a bunch of benchmarks from using hercules refs to use hercules boxes.
• Define AlignedAlloc global allocator in hercules_rt that aligns everything to 32 bytes.
• Bump nom version.

juno_samples/cava/src/cava.jn

@@ -152,7 +152,7 @@ fn gamut<row : usize, col : usize, num_ctrl_pts : usize>(
         let v  = v1 * v1 + v2 * v2 + v3 * v3;
         l2_dist[cp] = sqrt!::<f32>(v);
       }
-      
+     
       @channel_loop for chan = 0 to CHAN {
         let chan_val : f32 = 0.0;
         for cp = 0 to num_ctrl_pts {