[Misc] fix tests failure by using current_platform (vllm-project#25825)

Signed-off-by: Juechen Liu <[email protected]>

Author: kingsmad

vllm/attention/ops/triton_reshape_and_cache_flash.py

@@ -137,7 +137,7 @@ def triton_reshape_and_cache_flash(
 
     # heuristics instead of autotuning
     TILE_SIZE = min(2048, triton.next_power_of_2(n))
-    if torch.version.hip or torch.version.xpu:
+    if current_platform.is_rocm() or current_platform.is_xpu():
         num_stages = 4
         num_warps = 8
     else:  # cuda