[Kernel][Backend][Model] Blocksparse flash attention kernel and Phi-3-Small model (#4799)

Co-authored-by: beagleski <yunanzhang@microsoft.com>
Co-authored-by: bapatra <bapatra@microsoft.com>
Co-authored-by: Barun Patra <codedecde@users.noreply.github.com>
Co-authored-by: Michael Goin <michael@neuralmagic.com>

vllm/transformers_utils/config.py

@@ -63,4 +63,4 @@ def get_hf_text_config(config: PretrainedConfig):
         assert hasattr(config.text_config, "num_attention_heads")
         return config.text_config
     else:
-        return config
+        return config