[js/web] improve workaround for bundlers (#23902)
### Description
This PR improves the workaround for bundlers in onnxruntime-web.
Specifically, the following changes have been made:
- Use [this
workaround](https://github.com/xenova/onnxruntime/commit/9c50aa2c63bad4cb73ad77ff1c43e0c43da0907f)
as suggested by @xenova in
https://github.com/huggingface/transformers.js/pull/1161#issuecomment-2695785730
- Use `url > "file:" && url < "file;"` instead of
`url.startsWith("file:")` to allow minifiers to remove dead code
correctly.
This change allows to remove unnecessary dependencies of file parsed
from `new URL("ort.bundle.min.js", import.meta.url)` in Vite, and
optimize code like `if("file://filepath.js".startsWith("file:"))
{do_sth1(); } else {do_sth2();}` into `do_sth1()` for webpack/terser
usages.
Resolves https://github.com/huggingface/transformers.js/pull/1161
