[Flight] Override prepareStackTrace when reading stacks (#29740)

This lets us ensure that we use the original V8 format and it lets us
skip source mapping. Source mapping every call can be expensive since we
do it eagerly for server components even if an error doesn't happen.

In the case of an error being thrown we don't actually always do this in
practice because if a try/catch before us touches it or if something in
onError touches it (which the default console.error does), it has
already been initialized. So we have to be resilient to thrown errors
having other formats.

These are not as perf sensitive since something actually threw but if
you want better perf in these cases, you can simply do something like
`onError(error) { console.error(error.message) }` instead.

The server has to be aware whether it's looking up original or compiled
output. I currently use the file:// check to determine if it's referring
to a source mapped file or compiled file in the fixture. A bundled app
can more easily check if it's a bundle or not.