Return the loaded configs from `find_tsconfig` method even if an error happened

[sapphi-red]

When tsconfig.json extends tsconfig.extend.json and tsconfig.extend.json has a syntax error, I would like to know that tsconfig.json and tsconfig.extend.json is read, so that I can watch both files and re-execute when either of them are changed.

[Boshen]

We probably want the resolve_with_context if the goal is to watch files read, similar to webpack's https://github.com/webpack/enhanced-resolve/blob/03120de1180d9a13be6fd25d0683b81612306e8f/lib/Resolver.js#L349

[Boshen]

We can expose something like #1157

But I'm not sure how to surface these file dependencies to the watcher in rolldown so I'm going to put this PR on hold.