onnxruntime

[js] using OffscreenCanvas when DOM is not available (#19033)

### Description
when DOM API is not avaiable, using OffscreenCanvas


### Motivation and Context
In some environment like service worker or web worker, the DOM API is
not avaiable, we can use OffscreenCanvas API to replace
`document.createElement('canvas')`.
Most of the APIs of OffscreenCanvas and HTMLCanvasElement are the same,
except that `toDataUrl` is missing.

It fix this issues #19032