[SYCL] fix set main gpu error, support single/mul gpu mode

[NeoZhangJianyu]

1. fix error to set main gpu as non-zero.

2. add new APIs: ggml_backend_sycl_set_single_device_mode(), ggml_backend_sycl_set_mul_device_mode() to handle single/multiple cards by split-mode.
   In CI, enable ggml_backend_sycl_set_mul_device_mode() as default.
   If split-mode==layer (default), use all GPUs with top max compute unit.
   Else, use the main-gpu set by user as only device. It supports level_zero:gpu, opencl:gpu.

3. refactor the shown device list.

• change the order in shown device list.
  sort the devices by type (level_zero, opencl:gpu, opencl:cpu, opencl:acc) and max compute unit.
• add type item to follow the output style of tool sycl-ls.

found 6 SYCL devices:
|  |                  |                                             |compute   |Max compute|Max work|Max sub|               |
|ID|       Device Type|                                         Name|capability|units      |group   |group  |Global mem size|
|--|------------------|---------------------------------------------|----------|-----------|--------|-------|---------------|
| 0|[level_zero:gpu:0]|               Intel(R) Arc(TM) A770 Graphics|       1.3|        512|    1024|     32|    16225243136|
| 1|[level_zero:gpu:1]|                    Intel(R) UHD Graphics 770|       1.3|         32|     512|     32|    53651849216|
| 2|    [opencl:gpu:0]|               Intel(R) Arc(TM) A770 Graphics|       3.0|        512|    1024|     32|    16225243136|
| 3|    [opencl:gpu:1]|                    Intel(R) UHD Graphics 770|       3.0|         32|     512|     32|    53651849216|
| 4|    [opencl:cpu:0]|         13th Gen Intel(R) Core(TM) i7-13700K|       3.0|         24|    8192|     64|    67064815616|
| 5|    [opencl:acc:0]|               Intel(R) FPGA Emulation Device|       1.2|         24|67108864|     64|    67064815616|

4. update examples/sycl/run-llama2.sh
   support to switch in single/multiple cards by set device id as parameter.

[NeoZhangJianyu]

@ggerganov @slaren I recreate the PR due to the CI always be fault.
It includes same code change of #6022.

[ggerganov]

The CI using sanitizers is failing due to unrelated problems (some linux kernel update), so it is normal. If the SYCL builds are passing, it's ok to merge

[NeoZhangJianyu]

The CI using sanitizers is failing due to unrelated problems (some linux kernel update), so it is normal. If the SYCL builds are passing, it's ok to merge

OK! Thank you!

[NeoZhangJianyu]

@slaren Could you review and approve if it's OK!