[Bugfix] Fix DeepseekV32 `AssertionError: num_kv_heads == 1` (#33090)

Signed-off-by: NickLucche <nlucches@redhat.com>
(cherry picked from commit 492a7983)

vllm/distributed/kv_transfer/kv_connector/utils.py

@@ -322,7 +322,7 @@ class TpKVTopology:
         # Figure out whether the first dimension of the cache is K/V
         # or num_blocks. This is used to register the memory regions correctly.
         kv_cache_shape = self.attn_backend.get_kv_cache_shape(
-            num_blocks=1, block_size=16, num_kv_heads=4, head_size=1
+            num_blocks=1, block_size=16, num_kv_heads=1, head_size=1
         )
         # Non-MLA backends caches have 5 dims [2, num_blocks, H,N,D],
         # we just mock num_blocks to 1 for the dimension check below.