[Misc] Use deprecated for seed_everything (#31780)

Signed-off-by: DarkLight1337 <tlleungac@connect.ust.hk>

benchmarks/kernels/benchmark_paged_attention.py

@@ -13,6 +13,7 @@ from vllm.utils.argparse_utils import FlexibleArgumentParser
 from vllm.utils.torch_utils import (
     STR_DTYPE_TO_TORCH_DTYPE,
     create_kv_caches_with_random,
+    set_random_seed,
 )
 
 logger = init_logger(__name__)
@@ -38,7 +39,7 @@ def main(
     device: str = "cuda",
     kv_cache_dtype: str | None = None,
 ) -> None:
-    current_platform.seed_everything(seed)
+    set_random_seed(seed)
 
     scale = float(1.0 / (head_size**0.5))
     query = torch.empty(