[VitisAI] fix tensor has multi data type (microsoft#18188)

### Description
<!-- Describe your changes. -->
When take a tensor's data as raw, clear data with other types within the
tensor.


### Motivation and Context
<!-- - Why is this change required? What problem does it solve? -->
One model's graph transformation caused a node with multiple data types.
This would make the model valid.

onnxruntime/core/providers/vitisai/imp/tensor_proto.cc

@@ -16,6 +16,12 @@ gsl::span<const char> tensor_proto_as_raw(
     std::vector<uint8_t> unpacked_tensor;
     auto s = onnxruntime::utils::UnpackInitializerData(tensor, onnxruntime::Path(), unpacked_tensor);
     mut_tensor.mutable_raw_data()->resize(unpacked_tensor.size());
+    mut_tensor.clear_float_data();
+    mut_tensor.clear_int32_data();
+    mut_tensor.clear_string_data();
+    mut_tensor.clear_int64_data();
+    mut_tensor.clear_double_data();
+    mut_tensor.clear_uint64_data();
     memcpy(mut_tensor.mutable_raw_data()->data(), unpacked_tensor.data(), unpacked_tensor.size());
   }
   return gsl::span<const char>(tensor.raw_data().data(), tensor.raw_data().size());