perf(ext/node): convert fs helpers, streams, dgram, dns/utils to lazy-loaded ESM (#33936)
- Move 11 internal support modules from eager-loaded `esm` to
`lazy_loaded_esm` in `lib.rs`
- Within those files, convert top-level `import` from `node:*` modules
to `core.createLazyLoader` to defer loading until first use