onnxruntime

set node schema when apply NHWC transformer (#13660)

### Description
set node schema when apply NHWC transformer

### Motivation and Context
The implementation in `IExecutionProvider::GetCapability()` checks node
schema to determine the capability of the current EP. If NHWC graph
transformer created a new channel last `Conv` node to replace the
channel first `Conv` node, we need to assign the schema to the replaced
node.