[Bugfix]Fix the compatibility issue of may_reinitialize_input_batch (#6290)

### What this PR does / why we need it?
Added a check in the may_reinitialize_input_batch method to verify
whether the backend implements the get_supported_block_size method

### Does this PR introduce _any_ user-facing change?
no user-facing change

### How was this patch tested?
Only a few lines of code within the methods were modified, and the
format check test has been passed.
- vLLM version: v0.14.1
- vLLM main:
dc917cceb8

---------

Signed-off-by: Debuuuuger <huangzr@cmbchina.com>
Signed-off-by: debuger <102402761+huangazazaz@users.noreply.github.com>
Signed-off-by: Debuuuuger <12110718@mail.sustech.edu.cn>
Co-authored-by: Debuuuuger <huangzr@cmbchina.com>
Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

vllm_ascend/_310p/model_runner_310p.py

@@ -134,8 +134,8 @@ class NPUModelRunner310(NPUModelRunner):
                     num_blocks = sum_page_size_bytes // kv_cache_spec.page_size_bytes
                     assert num_blocks >= kv_cache_config.num_blocks
 
-                    if hasattr(attn_backend, "get_supported_block_size") and self.use_hybrid_blocks:
-                        block_size = attn_backend.get_supported_block_size()[0]
+                    if hasattr(attn_backend, "get_supported_kernel_block_sizes") and self.use_hybrid_blocks:
+                        block_size = attn_backend.get_supported_kernel_block_sizes()[0]
 
                         block_size_chunk = kv_cache_spec.block_size // block_size
                         kv_cache_shape = attn_backend.get_kv_cache_shape(