[DequantizeLinear] An error will be throw for per-axis int4/uint4 input data type

[lisa0314]

Error Log:
[WebNN] Failed to call GetOrtModelBuilderApi()->CreateSessionFromModel( env, model_info->model, session_options, session.GetAddressOf()): Could not find an implementation for Reshape(21) node with name 'inserted_reshape_2.

[lisa0314]

If we don't set --disable-features=WebNNOrtCpuFallback, all wpt tests of dequantizeLinear will fallback to ORT default CPU EP.
For per-axis dequantizeLinear , we need to insert reshape for scale and zeroPoint,. Unfortunately, CPU EP reshape implementation still can't support int4 and uint4 data type- https://github.com/microsoft/onnxruntime/blob/main/onnxruntime/core/providers/cpu/tensor/reshape.cc#L54.

If we set --disable-features=WebNNOrtCpuFallback, all wpt tests of dequantizeLinear failed-

[1380:8256:0331/203407.178:ERROR:graph_impl_ort.cc(189)] : [WebNN] Failed to call GetOrtModelEditorApi()->CreateSessionFromModel( env.get(), model_info->model.get(), session_options->get(), ScopedOrtSession::Receiver(session).get()): This session contains graph nodes that are assigned to the default CPU EP, but fallback to CPU EP has been explicitly disabled by the user.