Modifying SYCL affinity example to remove LZ dependence

[colleeneb]

The GPU affinity example for SYCL for Aurora was getting the GPU UUIDs by invoking Level Zero. Instead of using that, we can now use an intel extension to SYCL and get the UUIDs in a simpler manner. The benefit of this is: 1) less code, 2) this will also execute correctly on Polaris as well (I tested it) so people can run the exact same on Nvidia systems with SYCL as well, and 3) for users that want to print the UUID from their own code, this is a much simpler way than using Level Zero, so they could copy and paste from here.

The output is nearly the same, but the characters in the UUIDs are flipped. The uuid_print function here is the same as that in other examples in the Polaris directory for this repo, like Polaris/affinity_gpu/main.cpp and Polaris/ensemble/main.cpp, so I liked using it to be consistent. I don't know if it matters too much as long as we have unique IDs but I can edit it to match the previous one if people prefer. (I liked the new version since it puts the "1" and "2" to designate which tile it is at the end of the string instead of the start.)

Previously:

• Without gpu_tile_compact.sh:

  > mpirun -n 2 ./hello_affinity 
  To affinity and beyond!! nname= x1922c4s7b0n0  rnk= 1  list_cores= (1)  num_devices= 6  gpu_uuid=  00000000-0000-0000-db99-10551e7f667d 00000000-0000-0000-5b62-c4abd74d1941 00000000-0000-0000-3aba-5522a9f0dd20 00000000-0000-0000-c590-a61bb63088d4 00000000-0000-0000-1633-88e453e8161b 00000000-0000-0000-fbae-6c05b72c275b
  To affinity and beyond!! nname= x1922c4s7b0n0  rnk= 0  list_cores= (0)  num_devices= 6  gpu_uuid=  00000000-0000-0000-db99-10551e7f667d 00000000-0000-0000-5b62-c4abd74d1941 00000000-0000-0000-3aba-5522a9f0dd20 00000000-0000-0000-c590-a61bb63088d4 00000000-0000-0000-1633-88e453e8161b 00000000-0000-0000-fbae-6c05b72c275b

• With gpu_tile_compact.sh:

  > mpirun -n 6 gpu_tile_compact.sh ./hello_affinity 
  To affinity and beyond!! nname= x1922c4s7b0n0  rnk= 0  list_cores= (0)  num_devices= 1  gpu_uuid=  01000000-0000-0000-db99-10551e7f667d
  To affinity and beyond!! nname= x1922c4s7b0n0  rnk= 5  list_cores= (5)  num_devices= 1  gpu_uuid=  02000000-0000-0000-3aba-5522a9f0dd20
  To affinity and beyond!! nname= x1922c4s7b0n0  rnk= 4  list_cores= (4)  num_devices= 1  gpu_uuid=  01000000-0000-0000-3aba-5522a9f0dd20
  To affinity and beyond!! nname= x1922c4s7b0n0  rnk= 2  list_cores= (2)  num_devices= 1  gpu_uuid=  01000000-0000-0000-5b62-c4abd74d1941
  To affinity and beyond!! nname= x1922c4s7b0n0  rnk= 3  list_cores= (3)  num_devices= 1  gpu_uuid=  02000000-0000-0000-5b62-c4abd74d1941
  To affinity and beyond!! nname= x1922c4s7b0n0  rnk= 1  list_cores= (1)  num_devices= 1  gpu_uuid=  02000000-0000-0000-db99-10551e7f667d

With this branch:

• Without gpu_tile_compact.sh:

  > mpirun -n 2 ./hello_affinity 
  To affinity and beyond!! nname= x1922c4s7b0n0  rnk= 0  list_cores= (0)  num_devices= 6  gpu_uuids= 7d667f1e5510-99db-0000-000000000000, 41194dd7abc4-625b-0000-000000000000, 20ddf0a92255-ba3a-0000-000000000000, d48830b61ba6-90c5-0000-000000000000, 1b16e853e488-3316-0000-000000000000, 5b272cb7056c-aefb-0000-000000000000
  To affinity and beyond!! nname= x1922c4s7b0n0  rnk= 1  list_cores= (1)  num_devices= 6  gpu_uuids= 7d667f1e5510-99db-0000-000000000000, 41194dd7abc4-625b-0000-000000000000, 20ddf0a92255-ba3a-0000-000000000000, d48830b61ba6-90c5-0000-000000000000, 1b16e853e488-3316-0000-000000000000, 5b272cb7056c-aefb-0000-000000000000

• With gpu_tile_compact.sh:

  > mpirun -n 6 gpu_tile_compact.sh ./hello_affinity 
  To affinity and beyond!! nname= x1922c4s7b0n0  rnk= 0  list_cores= (0)  num_devices= 1  gpu_uuids= 7d667f1e5510-99db-0000-000000000001
  To affinity and beyond!! nname= x1922c4s7b0n0  rnk= 5  list_cores= (5)  num_devices= 1  gpu_uuids= 20ddf0a92255-ba3a-0000-000000000002
  To affinity and beyond!! nname= x1922c4s7b0n0  rnk= 1  list_cores= (1)  num_devices= 1  gpu_uuids= 7d667f1e5510-99db-0000-000000000002
  To affinity and beyond!! nname= x1922c4s7b0n0  rnk= 3  list_cores= (3)  num_devices= 1  gpu_uuids= 41194dd7abc4-625b-0000-000000000002
  To affinity and beyond!! nname= x1922c4s7b0n0  rnk= 2  list_cores= (2)  num_devices= 1  gpu_uuids= 41194dd7abc4-625b-0000-000000000001
  To affinity and beyond!! nname= x1922c4s7b0n0  rnk= 4  list_cores= (4)  num_devices= 1  gpu_uuids= 20ddf0a92255-ba3a-0000-000000000001

Let me know if there are comments or questions or anything to improve!