[Hardware][openvino] is_openvino --> current_platform.is_openvino (#9716)

vllm/platforms/__init__.py

@@ -65,6 +65,13 @@ try:
 except ImportError:
     pass
 
+is_openvino = False
+try:
+    from importlib.metadata import version
+    is_openvino = "openvino" in version("vllm")
+except Exception:
+    pass
+
 if is_tpu:
     # people might install pytorch built with cuda but run on tpu
     # so we need to check tpu first
@@ -85,6 +92,9 @@ elif is_cpu:
 elif is_neuron:
     from .neuron import NeuronPlatform
     current_platform = NeuronPlatform()
+elif is_openvino:
+    from .openvino import OpenVinoPlatform
+    current_platform = OpenVinoPlatform()
 else:
     current_platform = UnspecifiedPlatform()