Allocate aligned memory

Description

For runs on the CPU, the memory for the batches of the wavefunctions in the states is now allocated in an aligned way. The alignment is chosen according to the vectorization recognized at configure time. This improves vectorized instructions, especially for the finite difference kernels where vector instuction intrinsics are used.

This MR depends on MR !669 (merged).

News snippet

Improve vectorization by allocating aligned memory.

Checklist

• I have checked that my code follows the Octopus coding standards

src/grid/allocate_special.c

@@ -30,6 +30,7 @@ cudaError_t checkCuda(cudaError_t result)
   if (result != cudaSuccess) {
     fprintf(stderr, "CUDA Runtime Error: %s\n", cudaGetErrorString(result));
     assert(result == cudaSuccess);
+  }
 #endif
   return result;
 }