[1/N][Attention] Restructure attention: move files (#31916)

Signed-off-by: Matthew Bonanni <mbonanni@redhat.com>

benchmarks/kernels/benchmark_reshape_and_cache_flash.py

@@ -7,9 +7,6 @@ import torch
 from tabulate import tabulate
 
 from vllm import _custom_ops as ops
-from vllm.attention.ops.triton_reshape_and_cache_flash import (
-    triton_reshape_and_cache_flash,
-)
 from vllm.logger import init_logger
 from vllm.utils.argparse_utils import FlexibleArgumentParser
 from vllm.utils.torch_utils import (
@@ -17,6 +14,9 @@ from vllm.utils.torch_utils import (
     create_kv_caches_with_random_flash,
     set_random_seed,
 )
+from vllm.v1.attention.ops.triton_reshape_and_cache_flash import (
+    triton_reshape_and_cache_flash,
+)
 
 logger = init_logger(__name__)