Interprocedural sroa

Replaces !58 (closed) (so that the pipeline will actually run). Plus a fix to the Juno test given the change in signature from interprocedural SROA.

hercules_cg/src/manifest.rs

@@ -84,6 +84,10 @@ pub enum DeviceManifest {
         parallel_launch: Box<[(usize, DynamicConstantID)]>,
     },
     GPU,
+    Call {
+        // This is a Hercules function name, not a schedule IR function name.
+        callee: String,
+    },
 }
 
 impl Manifest {