[Feat]enable sfa cp for dsv3.2 (#4702)

### What this PR does / why we need it?
RFC: https://github.com/vllm-project/vllm/issues/30055

### How was this patch tested?
1. enable flashcommon1
export VLLM_ASCEND_ENABLE_FLASHCOMM1=1
2. enable sfa-cp
--additional-config '{ "enable_sfa_cp": true }' \

- vLLM version: v0.12.0
- vLLM main:
ad32e3e19c

Signed-off-by: AlvisGong <gwly0401@163.com>
Co-authored-by: clrs97 <524936896@qq.com>
Co-authored-by: zzhx1 <zzh_201018@outlook.com>
Co-authored-by: hwhaokun <haokun0405@163.com>
Co-authored-by: wangxiyuan <wangxiyuan1007@gmail.com>

vllm_ascend/utils.py

@@ -1067,3 +1067,15 @@ def refresh_block_size(vllm_config):
                 "Block size is set to 128 if prefix cache or chunked prefill is enabled."
             )
             cache_config.block_size = 128
+
+
+def dispose_layer(layer: Any):
+    for attr_name in dir(layer):
+        attr_value = getattr(layer, attr_name)
+        if isinstance(attr_value, torch.Tensor):
+            dispose_tensor(attr_value)
+
+
+def replace_layer(original_layer: Any, new_layer: Any):
+    original_layer.__class__ = new_layer.__class__
+    original_layer.__dict__ = new_layer.__dict__