onnxruntime

[web] utility functions for tensor<->image conversion in ORT web (#13603)

### Description
Data processing capabilities to ORT Web. 
This PR will focus augmenting raw data to and from Tensors.

### Motivation and Context
Enabling different app building use cases to leverage ORT in a more
natural form.
Currently, the user needs to process the data and call Tensor
constructors - these util functions will provide a direct path to
generating ORT tensors.

Co-authored-by: shalvamist <shalva.mist@microsoft.com>