Remove redundant to_normal_order after SetState in custatevecExStateVectorSetState (#1029)

Based on the cuStateVecEx documentation,
`custatevecExStateVectorSetState` respects the current wire ordering of
the state vector. Therefore, calling `to_normal_order()` to physically
rearrange the state is not logically required after initialization from
a host buffer, and it might even be undesirable if the caller intends to
keep a specific permutation for performance.

Removed the `to_normal_order()` calls and associated TODO comments from
both `Copy` overloads in `lib/vectorspace_custatevecex.h`.

Author: mhucka

lib/vectorspace_custatevecex.h

@@ -546,9 +546,6 @@ class VectorSpaceCuStateVecEx {
 
     ErrorCheck(custatevecExStateVectorSynchronize(dest.get()));
 
-    // TODO: do we need that?
-    dest.to_normal_order();
-
     return true;
   }
 
@@ -576,9 +573,6 @@ class VectorSpaceCuStateVecEx {
 
     ErrorCheck(custatevecExStateVectorSynchronize(dest.get()));
 
-    // TODO: do we need that?
-    dest.to_normal_order();
-
     return true;
   }