[wasm] Add support for symbolicating native traces from JS, using a symbols file...

[wasm] Add support for symbolicating native traces from JS, using a symbols file (#66042)

* [wasm] Fix run command lines for samples

* [wasm] Export FS_readFile

* [wasm] Add support for symbolicating traces in console errors, or

.. warnings. The regex patterns are hardcoded in `debug.ts`. And the
symbols are loaded from `dotnet.js.symbols`.

We try to symbolicate wherever possible.

* [wasm] Enable symbolicating for non-aot test builds by default

* [wasm] Enable symbol map for debugger tests

* Address feedback from @pavelsavara

* [wasm] Add a `mono_wasm_symbolicate_string` function

.. and use that to symbolicate traces marshaled as C# exceptions (thanks
to @pavelsavara for the suggestion).